[web2py:26104] Re: drop-box that keeps previous value

[annet]

 The question to ask here is what would it take to have a drop box keep the
 previous value as default.

It was just a thought. While entering data into a timetable table I
found it inconvenient that I had to select the day time and again from
the drop box, which defaults to Monday. Same thing when I entered data
into a table that contains the opening hours of a creche facility in a
fitness and health club. In this case I would like to keep the day
(defaults to Monday) and the facility (ordered alphabetically), not
the time fields. As I said, just a thought to improve usability to the
user.


 This should be a relatively simple quesition if you are talking about a
 value last saved - boiling down to now that I've selected / retrieved the
 last value, how do I programmatically set that as the default in the form?

The problem is I lack the proficiency in Python to program something
like this myself. Becoming proficient in Python figures highest on my
to do list, e.g. I need validators based on key value pairs in query
results, not being able to program them myself is rather
frustrating


 Try if form.accepts(...,keepvalues=True) does what you ask.

keepvalues=True keeps all the values, whereas I only want to keep
specific values.


Kind regards,

Annet.
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[web2py:26105] DAL remote control

[rb]

Thx for the speedy reply. Here's another question:

3) Because I'm doing a thick client, it creates db queries (SQL CRUD)
which need to be communicated back to the controller which must query
the db. The two ways to do this are:

a) use a SQL statement within a executesql command, or

b) create a DAL row selection criteria string and a column selection
criteria string, send them back to the controller which feeds them
through a python eval statement within a DAL function.

It is always pointed out that b) is dangerous because it's possible
for unintended string matter to get fed into the eval - which can reek
havoc. However only *my* strings from the client which I have
carefully massaged will ever be sent (e.g. I collect the column names
from the db beforehand and provide them to the db().select(fieldnames-
here) statement). Further, if I craft a SQL string then it too can
suffer from bad input. I just have to be extra careful when creating
the query strings.

However if I use a) then I lose all of the functionality provided by
the DAL. I've never been a fan of SQL and I'd like to avoid it in
favour of what the DAL can offer.

So I've implemented b) and it is working. My questions are:

i) am I missing the obvious? Is there a much simpler/better way to do
this?
ii) does the DAL add much overhead?







On Jul 9, 9:21 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 On Jul 9, 11:04 pm, rb rbspg...@gmail.com wrote:

  Hi all,

  I'm using Web2py to serve a wxPython thick client via XMLRPC. I'm
  currently using SQLite (I like the zero db config ;-) and I have a few
  questions:

  1) I have missed how to specify table constraints across several
  fields (in SQLite). For example, in a table the primary key consists
  of two fields - how do I specify that these two fields must comprise a
  UNIQUE value? In other dbs I could use executesql to just give the SQL
  commands, but SQLite (unless I'm mistaken) only allows table
  constraints within the CREATE TABLE SQL command. So can this be done
  in Web2py?

 You cannot create such constraint database side from
 web2py. Your options are:
 1) enforce the constraint at the validators level
 2) create the table outside web2py and set migrate=False

  2) I'm confused as to which models get run when a controller is
  accessed. If I have db.py and uom.py models and I access the uom
  controller, what happens? From stepping thru the debugger I saw db.py
  get run first, then uom.py and then uom.py again (weird). I've
  simplified things down to just one (db.py) file for now, but I'm
  wondering if the infrastructure's intent is to run all model files
  upon each and every controller access. Oh, my access of the controller
  is via XMLRPC function (if that changes anything).

 All of them. Alphabetically. There has been some discussion on whether
 there should be exceptions to this rule. It would be easy to inplmenet
 but there was no consensus on whether an improvement was necessary.
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[web2py:/] Re: IS_NOT_IN_DB() and no automatic drop box

[annet]

Massimo,

Thanks for putting so much effort in solving this problem. I tried the
latest trunk and replaced my code with the code you provided, the
error ticket I get reads like:


Traceback (most recent call last):
  File /Library/Python/2.5/site-packages/web2py/gluon/restricted.py,
line 176, in restricted
exec ccode in environment
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
controllers/appadmin.py, line 255, in module
  File /Library/Python/2.5/site-packages/web2py/gluon/globals.py,
line 103, in lambda
self._caller = lambda f: f()
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
controllers/appadmin.py, line 103, in insert
form = SQLFORM(db[table], ignore_rw=ignore_rw)
  File /Library/Python/2.5/site-packages/web2py/gluon/sqlhtml.py,
line 583, in __init__
elif field.type == 'upload':
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
models/db.py, line 278, in lambda
db.companyactivity.activity.widget=lambda f,v: OptionsWidget.widget
(db.companyactivity.activity,v)
  File /Library/Python/2.5/site-packages/web2py/gluon/sqlhtml.py,
line 195, in widget
options = requires0.other.options()
SyntaxError: widget cannot determine options of
companyactivity.activity


Since the key value pairs should come from the activity table I gave
that a try:

db.companyactivity.activity.widget=lambda f,v: OptionsWidget.widget
(db.activity.activity,v)

.. but that results in the same error.


I hope you're close to solving this problem.


Kind regards,

Annet.
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[web2py:26107] Re: SQLite table constraints and which model files are run?

[rb]

  2) I'm confused as to which models get run when a controller is
  accessed. If I have db.py and uom.py models and I access the uom
  controller, what happens? From stepping thru the debugger I saw db.py
  get run first, then uom.py and then uom.py again (weird). I've
  simplified things down to just one (db.py) file for now, but I'm
  wondering if the infrastructure's intent is to run all model files
  upon each and every controller access. Oh, my access of the controller
  is via XMLRPC function (if that changes anything).

 All of them. Alphabetically. There has been some discussion on whether
 there should be exceptions to this rule. It would be easy to inplmenet
 but there was no consensus on whether an improvement was necessary.

Is the session object defined when db.py is run? Could it be used to
send info for relevant-table declaration in order to prune down the
number of db.define_table statements?

Does anyone have a feel for what the overhead is of defining/declaring
a bunch of tables (in db.py) (which will never be used) - ie. is this
expensive? I suppose this greatly depends on the db used. For SQLite,
are the db.define_table() calls expensive? My (typical/ordinary) CRUD
program is segmented into a number of documents (or multitable
forms). However each will only touch a few of the many tables. Would
this make a case for db table-declaration segmentation?

BTW kudos to everyone involved in making web2py. For me, it has made
it _possible_ to get an app up and running quickly. I originally tried
to wade my way through learning Zope but it just made my head hurt. I
briefly looked at Django but after Zope I didn't think it differed
enough. I stumbled upon web2py almost by accident while surf...
researching and your feature list hooked me. I was able to convince
others (who are not technical minded at all) to choose this because
the benefits were so many and so understandable. Kudos.

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[web2py:26108] Re: DAL remote control

[Yarko Tymciurak]

I just have to point this out:  by definition (at least some) thick clients
operate regardless of being connected to a network or not...

So - here's anther way to talk about that concept;   Given a network
architecture something like this:

Presentatoin
--
Logic

Data persistence or device layer


(and we could show this as 4 or 5 layers, but the point remains the same)
it is a design choice where you put the network boundray.

Presentation
-- network --
Logic

Data Layer


would be what is typically called a thin client:  the business and
engineering logic is on the server; you can't run without it.
In web2py terms, the models and controllers are the two server layers.


Now, this change:

Presentation
-
Logic
--- network --
Data Layer


would be the fundamental change that would make for a thick / rich client.

Now, it can get fuzzy in the details - Flash (for example) is a rich client
which runs symbiotically with a rich server, BUT for these purposes, a
flash application in your browser (however rich) does not make for an
application that can run free of the network.

SO - my point is this:   web2py is a server-based application host, for use
with what would normally be called thin clients.

That is not to say that you could not have a thick client that would
interact symbiotically with a web2py server, but I would think that would be
through services.

When I read your question, and your statement about thick client, and how
you get web2py to work with it, I cannot help but wonder - whcih are you
doing -- building a thick client, or building a web2py application?  (Of
course you could be doing both, but that would be somewhat a special case,
and interesting in more details and discussion).

Regards

- Yarko

On Fri, Jul 10, 2009 at 1:55 AM, rb rbspg...@gmail.com wrote:


 Thx for the speedy reply. Here's another question:

 3) Because I'm doing a thick client, it creates db queries (SQL CRUD)
 which need to be communicated back to the controller which must query
 the db. The two ways to do this are:

 a) use a SQL statement within a executesql command, or

 b) create a DAL row selection criteria string and a column selection
 criteria string, send them back to the controller which feeds them
 through a python eval statement within a DAL function.

 It is always pointed out that b) is dangerous because it's possible
 for unintended string matter to get fed into the eval - which can reek
 havoc. However only *my* strings from the client which I have
 carefully massaged will ever be sent (e.g. I collect the column names
 from the db beforehand and provide them to the db().select(fieldnames-
 here) statement). Further, if I craft a SQL string then it too can
 suffer from bad input. I just have to be extra careful when creating
 the query strings.

 However if I use a) then I lose all of the functionality provided by
 the DAL. I've never been a fan of SQL and I'd like to avoid it in
 favour of what the DAL can offer.

 So I've implemented b) and it is working. My questions are:

 i) am I missing the obvious? Is there a much simpler/better way to do
 this?
 ii) does the DAL add much overhead?







 On Jul 9, 9:21 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  On Jul 9, 11:04 pm, rb rbspg...@gmail.com wrote:
 
   Hi all,
 
   I'm using Web2py to serve a wxPython thick client via XMLRPC. I'm
   currently using SQLite (I like the zero db config ;-) and I have a few
   questions:
 
   1) I have missed how to specify table constraints across several
   fields (in SQLite). For example, in a table the primary key consists
   of two fields - how do I specify that these two fields must comprise a
   UNIQUE value? In other dbs I could use executesql to just give the SQL
   commands, but SQLite (unless I'm mistaken) only allows table
   constraints within the CREATE TABLE SQL command. So can this be done
   in Web2py?
 
  You cannot create such constraint database side from
  web2py. Your options are:
  1) enforce the constraint at the validators level
  2) create the table outside web2py and set migrate=False
 
   2) I'm confused as to which models get run when a controller is
   accessed. If I have db.py and uom.py models and I access the uom
   controller, what happens? From stepping thru the debugger I saw db.py
   get run first, then uom.py and then uom.py again (weird). I've
   simplified things down to just one (db.py) file for now, but I'm
   wondering if the infrastructure's intent is to run all model files
   upon each and every controller access. Oh, my access of the controller
   is via XMLRPC function (if that changes anything).
 
  All of them. Alphabetically. There has been some discussion on whether
  there should be exceptions to this rule. It would be easy to inplmenet
  but there was no consensus on whether an improvement was necessary.
 


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[web2py:26109] Re: DAL remote control

[SergeyPo]

I understand that Rb does something like I am doing: uses web2py with
SQLite for standalone mode; without a server. At least this feature
initially convinced me to try web2py. This make a very appealing
proposition: use simple, easy to use tools (python + html) to develop
a cross-platform application with quite rich user interface, and who
cares that it's technically a web app. That he calls a thick client.
Is that true?

I started with this but quickly went beyond SQLite capabilities, so my
app has turned into full blown intranet application with oracle
backend, but I still advertize its demo version as standalone app.

I wrote once a while ago when we discussed killer apps for web2py,
that there is quite a market for standalone application based on web
technologies and basically all we need to add is a native platform
wrapper for browser that automatically runs web2py server and opens
browser at localhost:8000.

Sorry for offtopic.

On Jul 10, 11:31 am, Yarko Tymciurak yark...@gmail.com wrote:
 I just have to point this out:  by definition (at least some) thick clients
 operate regardless of being connected to a network or not...

 So - here's anther way to talk about that concept;   Given a network
 architecture something like this:

 Presentatoin
 --
 Logic
 
 Data persistence or device layer

 (and we could show this as 4 or 5 layers, but the point remains the same)
 it is a design choice where you put the network boundray.

 Presentation
 -- network --
 Logic
 
 Data Layer

 would be what is typically called a thin client:  the business and
 engineering logic is on the server; you can't run without it.
 In web2py terms, the models and controllers are the two server layers.

 Now, this change:

 Presentation
 -
 Logic
 --- network --
 Data Layer

 would be the fundamental change that would make for a thick / rich client.

 Now, it can get fuzzy in the details - Flash (for example) is a rich client
 which runs symbiotically with a rich server, BUT for these purposes, a
 flash application in your browser (however rich) does not make for an
 application that can run free of the network.

 SO - my point is this:   web2py is a server-based application host, for use
 with what would normally be called thin clients.

 That is not to say that you could not have a thick client that would
 interact symbiotically with a web2py server, but I would think that would be
 through services.

 When I read your question, and your statement about thick client, and how
 you get web2py to work with it, I cannot help but wonder - whcih are you
 doing -- building a thick client, or building a web2py application?  (Of
 course you could be doing both, but that would be somewhat a special case,
 and interesting in more details and discussion).

 Regards

 - Yarko



 On Fri, Jul 10, 2009 at 1:55 AM, rb rbspg...@gmail.com wrote:

  Thx for the speedy reply. Here's another question:

  3) Because I'm doing a thick client, it creates db queries (SQL CRUD)
  which need to be communicated back to the controller which must query
  the db. The two ways to do this are:

  a) use a SQL statement within a executesql command, or

  b) create a DAL row selection criteria string and a column selection
  criteria string, send them back to the controller which feeds them
  through a python eval statement within a DAL function.

  It is always pointed out that b) is dangerous because it's possible
  for unintended string matter to get fed into the eval - which can reek
  havoc. However only *my* strings from the client which I have
  carefully massaged will ever be sent (e.g. I collect the column names
  from the db beforehand and provide them to the db().select(fieldnames-
  here) statement). Further, if I craft a SQL string then it too can
  suffer from bad input. I just have to be extra careful when creating
  the query strings.

  However if I use a) then I lose all of the functionality provided by
  the DAL. I've never been a fan of SQL and I'd like to avoid it in
  favour of what the DAL can offer.

  So I've implemented b) and it is working. My questions are:

  i) am I missing the obvious? Is there a much simpler/better way to do
  this?
  ii) does the DAL add much overhead?

  On Jul 9, 9:21 pm, mdipierro mdipie...@cs.depaul.edu wrote:
   On Jul 9, 11:04 pm, rb rbspg...@gmail.com wrote:

Hi all,

I'm using Web2py to serve a wxPython thick client via XMLRPC. I'm
currently using SQLite (I like the zero db config ;-) and I have a few
questions:

1) I have missed how to specify table constraints across several
fields (in SQLite). For example, in a table the primary key consists
of two fields - how do I specify that these two fields must comprise a
UNIQUE value? In other dbs I could use executesql to just give the SQL
commands, but SQLite (unless I'm mistaken) only allows table
constraints within the CREATE TABLE SQL command. So can this be 

[web2py:26110] Re: DAL remote control

[rb]

Interesting post, Yarko. I think Sergey has a good idea of what I'm up
to (gee, I didn't discover/invent this?;-)

My plan is to use web2py to provide the business logic and db, ie the
server functionality, although it will co-exist on the same machine
as the thick client (until the project moves along quite a bit).
However, I distinguish the diff between a thick and thin client not by
where I place the business logic (the only logic on the client is
validation-code) but by what means (or protocol) the high-speed
interaction of the user input/feedback with the business logic takes
place (whew!). For a clarification of that last sentence consider a
simple webpage with an html form. It is the prototypical thin client
because there is (almost) no client side logic. In comes ajax and
google and you have a whole ecosystem of ajax technologies (like
Google Web Toolkit) which can greatly speed up the interaction of the
thin client with the user - using javascript, the web browser can now
run client side logic, yet we still call this a thin client - even
if that muddies the waters. A thick client, because it has great
client side code-power, can have all sorts of fancy-shmancy widgets
(we'll ignore Google and their GWT for now), that can interact at high
speed with the user. If this client only does (rudimentary) validation
of input and sends the bulk of the raw data over to the server, where
business logic there processes it then I call this a thick client
and (I assert) it is not rally doing any more of the business logic
than the thin client, it's just much faster interacting with the user.

So, before the advent of ajax, the choice was between simplistic (and
slow) thin clients (that required no deployment) and fast, fancy,
interactive thick clients that required deployment and complicated/low-
level communication protocols (like sockets). Today the choice seems
(to me) to be to use ajax and thin clients. However, I'm new to this
web programming gig (previous experience in CRUD apps and systems
programming) and I worked thru Google's GWT example app on line.
OH_MY_GAWD. You've GOT to be kidding me. To generate an app which has
a textbox and can populate a list from entries in the textbox which
pretends to be a stock ticker with a timer that fires to update
(random) deltas in the stock price involves PAGES of code. Great
heaping GOBS of code. Code of all manner. CSS stuff, XML, blah blah
blah. My old company has a team of twenty writing their ajax/GWT
platform for their app and they've been at it for 6 months now -
they're now getting ready to hand the SDK over to the app
programmers.

I don't have the resources for ajax thin client programming. I'll
stick with the trials of deploying the thick client.

But wait, I'll also need to generate lots of reports and you could
burn me with fire before I'll slog through using Crystal Reports for
this. No, I can use Web2py and python and code up some html reports
from the db. The entry forms and inquiry forms of the thick client I'm
doing in wxPython will work fine. I can use xmlrpc for the client-to-
svr protocol. Who cares if its grossly slow ? (even though I'm led to
believe that it's not so slow) if it's all on the same machine.
However, the customer wants to see his reports from his browser out on
the 'net somewhere. How can I deliver such? Oh look, there's web2py.
Awesome. In a few short days of reading even *I* can understand how to
hack something together - and I'm just starting (in python). I've
still got to watch out for the speed of communication issue but that's
tomorrow's problem and there won't be a tomorrow if I have to use
ajax.

But again, I'm kinda new to all this stuff, so I stand to be corrected
if I'm being naive... ;-)

---
Rb



On Jul 10, 12:31 am, Yarko Tymciurak yark...@gmail.com wrote:
 I just have to point this out:  by definition (at least some) thick clients
 operate regardless of being connected to a network or not...

 So - here's anther way to talk about that concept;   Given a network
 architecture something like this:

 Presentatoin
 --
 Logic
 
 Data persistence or device layer

 (and we could show this as 4 or 5 layers, but the point remains the same)
 it is a design choice where you put the network boundray.

 Presentation
 -- network --
 Logic
 
 Data Layer

 would be what is typically called a thin client:  the business and
 engineering logic is on the server; you can't run without it.
 In web2py terms, the models and controllers are the two server layers.

 Now, this change:

 Presentation
 -
 Logic
 --- network --
 Data Layer

 would be the fundamental change that would make for a thick / rich client.

 Now, it can get fuzzy in the details - Flash (for example) is a rich client
 which runs symbiotically with a rich server, BUT for these purposes, a
 flash application in your browser (however rich) does not make for an
 application that can run free of the network.

 SO - 

[web2py:26112] Re: One professional app to showcase Web2py

[gluegl]

Great idea!!
It should also include DIM/DIM support, SMS/VoIP Conference support
-G

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[web2py:26113] latest sqlhtml.py breaks update function

[annet]

After replacing the sqlhtml file with the latest sqlhtml file in trunk
I get the following error ticket on all my update functions:

Error traceback

Traceback (most recent call last):
  File /Library/Python/2.5/site-packages/web2py/gluon/restricted.py,
line 176, in restricted
exec ccode in environment
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
controllers/tier2.py, line 164, in module
  File /Library/Python/2.5/site-packages/web2py/gluon/globals.py,
line 103, in lambda
self._caller = lambda f: f()
  File /Library/Python/2.5/site-packages/web2py/gluon/tools.py, line
1371, in f
return action(*a, **b)
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
controllers/tier2.py, line 47, in update_activity
form=update_form(db.bedrijfactiviteit,record,'crud_activity')
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
models/db.py, line 704, in update_form
form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
  File /Library/Python/2.5/site-packages/web2py/gluon/tools.py, line
1756, in update
keepvalues=self.settings.keepvalues):
  File /Library/Python/2.5/site-packages/web2py/gluon/sqlhtml.py,
line 837, in accepts
if fields[fieldname] != None:
KeyError: 'activity'


Kind regards,

Annet.

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[web2py:26114] Re: latest sqlhtml.py breaks update function

[Hans Donner]

What version where you using before (please spicy svn or bazaar/launchpad) ?

Can you (perhpas) try what version is still working: see eg
http://bazaar.launchpad.net/~mdipierro/web2py/devel/changes?filter_file_id=sqlhtml.py-20080629222958-hhdxylrn88oe0xku-48

Can you show some simple code that we can use to reproduce this?


On Fri, Jul 10, 2009 at 2:21 PM, annetannet.verm...@gmail.com wrote:

 After replacing the sqlhtml file with the latest sqlhtml file in trunk
 I get the following error ticket on all my update functions:

 Error traceback

 Traceback (most recent call last):
  File /Library/Python/2.5/site-packages/web2py/gluon/restricted.py,
 line 176, in restricted
    exec ccode in environment
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
 controllers/tier2.py, line 164, in module
  File /Library/Python/2.5/site-packages/web2py/gluon/globals.py,
 line 103, in lambda
    self._caller = lambda f: f()
  File /Library/Python/2.5/site-packages/web2py/gluon/tools.py, line
 1371, in f
    return action(*a, **b)
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
 controllers/tier2.py, line 47, in update_activity
    form=update_form(db.bedrijfactiviteit,record,'crud_activity')
  File /Library/Python/2.5/site-packages/web2py/applications/cms/
 models/db.py, line 704, in update_form
    form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
  File /Library/Python/2.5/site-packages/web2py/gluon/tools.py, line
 1756, in update
    keepvalues=self.settings.keepvalues):
  File /Library/Python/2.5/site-packages/web2py/gluon/sqlhtml.py,
 line 837, in accepts
    if fields[fieldname] != None:
 KeyError: 'activity'


 Kind regards,

 Annet.

 


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[web2py:26115] Re: DAL remote control

[Fran]

On Jul 10, 10:43 am, Yarko Tymciurak yark...@gmail.com wrote:
 Regardless, you are trying to use something other than a browser for the
 client end (if I recall)

wxPython, yes

, so that does deserve some
 extra discussion, as the view part of web2py assumes an html / xhtml client
 (that's what it generates to send out the wire, that's the protocol.

Access is purely via WebServices which I see as being very important 
another area which Web2Py makes easy (to start with at least).
I'm personally more into JSON than XML for WAN performance but this is
designed to be on localhost, so XML is just fine...

Web2Py does in fact include view templates for these formats:
generic.json  generic.xml

I've not tried these myself yet though.

F
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[web2py:26117] Re: DAL remote control

[Fran]

On Jul 10, 9:40 am, rb rbspg...@gmail.com wrote:
 I don't have the resources for ajax thin client programming. I'll
 stick with the trials of deploying the thick client.

I don't think you need full-blown GWT to have an AJAX client.
jQuery (integrated with Web2Py) allows 'progressive enhancement' of
plain old HTML to increase interactivity.
e.g. look at the miracle of the dataTables plugin which I'm just about
to make use of:
http://www.datatables.net/

 But wait, I'll also need to generate lots of reports and you could
 burn me with fire before I'll slog through using Crystal Reports for
 this. No, I can use Web2py and python and code up some html reports
 from the db. The entry forms and inquiry forms of the thick client I'm
 doing in wxPython will work fine.

Even easier if you let Web2Py build these for you via sqlhtml.py :)
You can AJAXify the forms using jQuery Form plugin if you like...

 I can use xmlrpc for the client-to-
 svr protocol. Who cares if its grossly slow ? (even though I'm led to
 believe that it's not so slow) if it's all on the same machine.

Same machine = no big issue...JSON is only better for WAN
performance.

 However, the customer wants to see his reports from his browser out on
 the 'net somewhere. How can I deliver such? Oh look, there's web2py.
 Awesome. In a few short days of reading even *I* can understand how to
 hack something together - and I'm just starting (in python). I've
 still got to watch out for the speed of communication issue but that's
 tomorrow's problem and there won't be a tomorrow if I have to use
 ajax.

Well, I think that maybe you'd be better with Web2Py/jQuery rather
than Web2Py/wxPython.
However what you propose is also ok...

F
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[web2py:26119] Re: new chapters for the book CRUD and AUTH

[Fran]

On Jul 10, 2:33 am, rb rbspg...@gmail.com wrote:
 Currently I'm using SQLite for the db although later I might switch to
 postgres. I'm trying to understand how best to create my tables (eg.
 how to specify a UNIQUE constraint over two or three fields for my
 primary key?). Oh gosh, I shouldn't post my questions here.

Here is an example of a custom multi-table IS_IN_DB():
http://groups.google.com/group/web2py/browse_thread/thread/cae53d68c91938c5

You want one for IS_NOT_IN_DB()

Original is in gluon/validators.py

F
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[web2py:26121] ip of a logged-in-user

[Piotr Banaszkiewicz]

Hi,

I don't know whether web2py has this built-in, but here's concept:

table logged_in: user_id, time
time is time of user's last activity

When user opens some page or downs a file, or just does something, then you 
update logged_in.time to actual time.

Now, if you want to see list of logged in users in last 5 minutes, just:

select user_id, time from logged_in where time=NOW()-5minutes;


It's not perfect, though, but it's HTTP legacy. Stateless protocol.

Regards,
Piotr.

Dnia piątek 10 lipca 2009 o 14:46:28 Kuba Kucharski napisał(a):
 Hi, again

 how to list all currently logged users?

 If I have to make my own boolean column like logged_in in the user
 table how do I handle logout and expire?

 auth.settings.. ? not that easy ?

 I see onlogout here:
 http://mdp.cti.depaul.edu/examples/static/epydoc/web2py.gluon.tools2.Auth-c
lass.html but what about handling expiry?

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[web2py:26124] Re: override default model values in SQLFORM

[David Zejda]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Please, do you have any advices?

David Zejda napsal(a):
 Hello,
 
 I have table with a subject field, with default value specified in model.
 
 Now I would like to generate forms to add and update records.
 In the forms the default value specified in the model has to be
 overriden on certain conditions.
 
 I tried these:
 
 form.vars.subject = another default value
 
 form.custom.dspval.subject = another default value
 
 form.custom.inpval.subject = another default value
 
 But none of them works, still there are model default values pre-filled in
 the form fields.
 
 Please, could you help?
 
 Thanks in advance..
 
 David
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[web2py:26125] Re: latest sqlhtml.py breaks update function

[annet]

Hans,

 What version where you using before (please spicy svn or bazaar/launchpad) ?
I was using the sqlhtml file that came with the source code of web2py
version 1.65.0.


 Can you (perhpas) try what version is still working: see 
 eghttp://bazaar.launchpad.net/~mdipierro/web2py/devel/changes?filter_fi...
(bazaar launchpad) I checked all versions of the sqlhtml.py file from
1005 upward, version 1012  is the last one that works, version 1013
breaks the update function, as does version 1014.


 Can you show some simple code that we can use to reproduce this?
I wanted to update a record using the web2py's admin when I discovered
that the update function no longer works, my own update functions call
the update function:


@auth.requires_membership('tier2_manager')
def update_openinghour():
response.view='tier1/update.html'
db.openingstijd.bedrijf.writable=False
record=db.openingstijd[request.args[0]]
if not record or not record.bedrijf==auth.user.bedrijf:
redirect(URL(r=request,f='crud_openinghour'))
form=update_form(db.openingstijd,record,'crud_openinghour')
return dict(form=form)

def update_form(table,rec,nxt):
form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
form[0][-1][1].append(INPUT
(_type='button',_value='Cancel',_onclick='javascript:history.go(-1)'))
return form


Kind regards,

Annet.
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[web2py:26126] Re: DAL remote control

[mdipierro]

There is no eval in DAL. Actually b) is safer. The overhead is
negligible compared to the database IO times. You are doing the right
thing

On Jul 10, 1:55 am, rb rbspg...@gmail.com wrote:
 Thx for the speedy reply. Here's another question:

 3) Because I'm doing a thick client, it creates db queries (SQL CRUD)
 which need to be communicated back to the controller which must query
 the db. The two ways to do this are:

 a) use a SQL statement within a executesql command, or

 b) create a DAL row selection criteria string and a column selection
 criteria string, send them back to the controller which feeds them
 through a python eval statement within a DAL function.

 It is always pointed out that b) is dangerous because it's possible
 for unintended string matter to get fed into the eval - which can reek
 havoc. However only *my* strings from the client which I have
 carefully massaged will ever be sent (e.g. I collect the column names
 from the db beforehand and provide them to the db().select(fieldnames-
 here) statement). Further, if I craft a SQL string then it too can
 suffer from bad input. I just have to be extra careful when creating
 the query strings.

 However if I use a) then I lose all of the functionality provided by
 the DAL. I've never been a fan of SQL and I'd like to avoid it in
 favour of what the DAL can offer.

 So I've implemented b) and it is working. My questions are:

 i) am I missing the obvious? Is there a much simpler/better way to do
 this?
 ii) does the DAL add much overhead?

 On Jul 9, 9:21 pm, mdipierro mdipie...@cs.depaul.edu wrote:

  On Jul 9, 11:04 pm, rb rbspg...@gmail.com wrote:

   Hi all,

   I'm using Web2py to serve a wxPython thick client via XMLRPC. I'm
   currently using SQLite (I like the zero db config ;-) and I have a few
   questions:

   1) I have missed how to specify table constraints across several
   fields (in SQLite). For example, in a table the primary key consists
   of two fields - how do I specify that these two fields must comprise a
   UNIQUE value? In other dbs I could use executesql to just give the SQL
   commands, but SQLite (unless I'm mistaken) only allows table
   constraints within the CREATE TABLE SQL command. So can this be done
   in Web2py?

  You cannot create such constraint database side from
  web2py. Your options are:
  1) enforce the constraint at the validators level
  2) create the table outside web2py and set migrate=False

   2) I'm confused as to which models get run when a controller is
   accessed. If I have db.py and uom.py models and I access the uom
   controller, what happens? From stepping thru the debugger I saw db.py
   get run first, then uom.py and then uom.py again (weird). I've
   simplified things down to just one (db.py) file for now, but I'm
   wondering if the infrastructure's intent is to run all model files
   upon each and every controller access. Oh, my access of the controller
   is via XMLRPC function (if that changes anything).

  All of them. Alphabetically. There has been some discussion on whether
  there should be exceptions to this rule. It would be easy to inplmenet
  but there was no consensus on whether an improvement was necessary.
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[web2py:26127] Re: latest sqlhtml.py breaks update function

[annet]

Hans,

 What version where you using before (please spicy svn or bazaar/launchpad) ?
I was using the sqlhtml file that came with the source code of web2py
version 1.65.0.

 Can you (perhpas) try what version is still working: see 
 eghttp://bazaar.launchpad.net/~mdipierro/web2py/devel/changes?filter_fi...
(bazaar launchpad) I checked all versions of the sqlhtml.py file from
1005 upward, version 1011  is the last one that works, version 1013
breaks the update function, as does version 1014.

 Can you show some simple code that we can use to reproduce this?
I wanted to update a record using the web2py's admin when I discovered
that the update function no longer works, my own update functions
call
the update function:

@auth.requires_membership('tier2_manager')
def update_openinghour():
response.view='tier1/update.html'
db.openingstijd.bedrijf.writable=False
record=db.openingstijd[request.args[0]]
if not record or not record.bedrijf==auth.user.bedrijf:
redirect(URL(r=request,f='crud_openinghour'))
form=update_form(db.openingstijd,record,'crud_openinghour')
return dict(form=form)
def update_form(table,rec,nxt):
form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
form[0][-1][1].append(INPUT
(_type='button',_value='Cancel',_onclick='javascript:history.go
(-1)'))
return form


Kind regards,

Annet.

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[web2py:26128] Re: override default model values in SQLFORM

[Hans Donner]

David, 10 minutes after your original post there was already a reply:

http://groups.google.com/group/web2py/browse_thread/thread/de36120b9337f00d/1fde78aa5827a84c?hl=enlnk=gstq=override+default+model+values+in+SQLFORM#1fde78aa5827a84c



2009/7/10 David Zejda d...@atlas.cz:

 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Please, do you have any advices?

 David Zejda napsal(a):
 Hello,

 I have table with a subject field, with default value specified in model.

 Now I would like to generate forms to add and update records.
 In the forms the default value specified in the model has to be
 overriden on certain conditions.

 I tried these:

 form.vars.subject = another default value

 form.custom.dspval.subject = another default value

 form.custom.inpval.subject = another default value

 But none of them works, still there are model default values pre-filled in
 the form fields.

 Please, could you help?

 Thanks in advance..

 David
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 Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

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 qOAAoIaIojQTG4Jfx2bhdet7Hx0VzQMz
 =02Cn
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[web2py:26129] Re: Ruby 1.9 VS Python 3!!!

[mdipierro]

Pyhon 3 is probably the future but as of know the database drivers do
not work with it.  I also believe Python 3 is slower then Python
2.5-6.

The main new features of Python 3 consists of default unicode strings
and possibility to code in unicode (imagine function names with
Chinese or Russian names). I disagree with Guido that this is a good
idea. Allowing people to program in their alphabet will result in less
exchange of code, not more and hard to read applications.

At this point I see no reason to use Python 3.x,

Massimo

On Jul 10, 12:19 am, eric cs eeri...@gmail.com wrote:
 Thanks guys,
 So those books about Python 3.0, it's useless if I am planning to learn
 Web2py Python's version.
 Because they say:
 

 Python 3 is the best version of the language yet: It is more powerful,
 convenient, consistent, and expressive than ever before. Now, leading Python
 programmer Mark Summerfield demonstrates how to write code that takes full
 advantage of Python 3’s features and idioms. The first book written from a
 completely “Python 3” viewpoint, *Programming in Python 3 *brings together
 all the knowledge you need to write any program, use any standard or
 third-party Python 3 library, and create new library modules of your own.

    - Developing in Python using procedural, object-oriented, and functional
    programming paradigms
    - Creating custom packages and modules
    - Writing and reading binary, text, and XML files, including optional
    compression, random access, and text and XML parsing
    - Leveraging advanced data types, collections, control structures, and
    functions
    - Spreading program workloads across multiple processes and threads
    - Programming SQL databases and key-value DBM files
    - Utilizing Python’s regular expression mini-language and module
    - Building usable, efficient, GUI-based applications
    - Advanced programming techniques, including generators, function and
    class decorators, context managers, descriptors, abstract base classes,
    metaclasses, and more

 

 On Fri, Jul 10, 2009 at 12:45 AM, Yarko Tymciurak yark...@gmail.com wrote:
  Python 3 requires some code changes to applications.  While these are not
  really great, the deal is (it seems always with major Python release
  changes)  that it's easier to migrate an app than a framework - as (for
  example) web2py and django use mod_wsgi, all sorts of db backends,
  libraries, etc.   When all those port and are stable and available, then the
  applications that use the various libraries from the Python community
  usually follow suite.

  Consider it will take something on the order of a year or so.

  BTW - the web2py code base itself is poised to run on Python 3, but until
  those other things are there (and tested) it wouldn't be terribly useful.

  On Thu, Jul 9, 2009 at 8:28 PM, eric cs eeri...@gmail.com wrote:

  Oh I was wondering why Web2py and Django are not using the last
  version of Python 3 as well.
  Thanks.

  On Jul 9, 9:11 pm, eric cs eeri...@gmail.com wrote:
   Hey guys,

   I am a newbie and Python and amazed by Web2py so I was wondering
   Can you compared them for me? As far as best features, closures,mixins
   and etc?
   Which one is easier to a newbie learn and why?
   I do know they look like each other but I saw some people saying
   Python is more mature than Ruby.
   Although Python and it's frameworks has much less books than Ruby and
   Rails.
   Some people like that because leaves Python on the
   underground...hackers...heheh
   Thanks.
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[web2py:26130] Re: web2py based queue

[mdipierro]

You can use web2py cron and trigger the processing immediately after
the action that queues the tasks returns.

Massimo

On Jul 10, 8:11 am, kralin andrea.pierle...@gmail.com wrote:
 I finally made it, at least for now.

 There is a database table where all the processes are stored, both to
 be processed and completed ones.

 db.define_table('work',
                 SQLField('name','string'),
                 SQLField('status','string'),
                 SQLField('priority','integer'),
                 SQLField('input','text'),
                 SQLField('results','text'),
                 SQLField
 ('date_submitted','datetime',default=datetime.datetime.now()),
                 SQLField('date_completed','datetime'),
                 )

 than there is a cron that each minute look a the table and if there
 are jobs to process runs the first one.

 def process_job():
     queue=db(db.work.status=='to be done').select
 (orderby=db.work.priority)
     if queue:
         job=queue[0]
         #do stuff like:
         input_string=job.input
         output_string='Procesed by cron worker : '+str(input_string)
         #submit results
         db.work[job.id]=dict
 (status='completed',results=output_string,date_completed=datetime.datetime.now
 ())
         db.commit()
     return

 the problem with this is that I have to wait one minute for each table
 lookup, and that I'm not sure it will work correctly under WSGI, since
 I do not want to rely on system cron.
 The fastest improvement would be to run all the process in queue each
 time the controller is called by the cron,
 one by one, but I'm still convinced that using cron is not the best
 way to do this, even if it works.

 Am I the only one with this kind of issues? If not maybe I can post
 the solution to AlterEgo...

 On Jul 10, 3:19 am, mdipierro mdipie...@cs.depaul.edu wrote:

  You can use the databae as long the objects are serializable

  On Jul 9, 6:00 pm, kralin andrea.pierle...@gmail.com wrote:

   thanks massimo, very elegant...
   I have to check for the lock thing, otherwise a list is more tha
   sufficient for thequeue:

  queue=cache.ram('queue',lambda:[],10**10)
  queue.append(o)
  queue.pop(0)

   it should be also very easy to use a priority schedule by appending
   [int(priority), task] to thequeuelist.

   however I still need to cope with the guy that's going to do the heavy
   job.
   Is it possibile to set a Worker in web2py that is able to read the
   input from thequeueand put the results in a database, or do I have
   to launch a cron each minute to check for thequeue?

   On 10 Lug, 00:00, mdipierro mdipie...@cs.depaul.edu wrote:

You can do something like

classQueue:
    forever = 10**10
    def __init__(self):
        import thread
        self.q=[]
        self.lock=thread.allocate_lock()
    def enque(self,o):
        self.lock.acquire()
        self.q.append(o)
        self.lock.release()
    def dequeue(self):
        self.lock.acquire()
        o = self.q[0]
        del q[0]
        self.lock.release()
        return o
    def __len__(self):
        self.lock.acquire()
        ell=len(self.q)
        self.lock.release()
        return ell

   queue=cache.ram('queue',lambda:Queue,Queue.forever)
   queue.enqueue('object')
print len(queue)
o =queue.dequeue()

If you define it in a model it will be visible everywhere, including
cron scripts. I am not sure if the lock is really necessary (because
of the global interpreter lock) but it is safe.

   queue.append(

On Jul 9, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

 Hi All,
 I'm diving into web2py that at the moment gives me the power and the
 time do a lot of cool things. so thanks a lot to you guys.
 I was wondering if any of you ever had the need to set aqueuefor a
 heavy process.
 Let's suppose I've got one heavy process that takes 2 mins to run on a
 singol-processor machine.
 now if 10 user submit the process at (more or less) the same time, is
 there a way to schedule the process based on the first coming, first
 to have response rule? each of this user should be able to see their
 result once completed or see something likewait, 8 jobs still in
queue

 I know it can be done easily with external job sheduler, but it will
 require to use a separate process, not beeing portable, and a little
 bit more headhache...

 a quick and dirty solution wuld be to run a cron each, let's say, 2
 mins and if a process isqueue, execute it, but I feel that can be
 done in a much more elegant way.

 what do youthink?
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[web2py:26131] Re: new chapters for the book CRUD and AUTH

[Álvaro Justen [Turicas]]

On Tue, Jul 7, 2009 at 00:06, Alexandre Andradealexandrema...@gmail.com wrote:
 I think I good information to put in 'auth' section, besides the Renaming
 Auth tables is how translate auth tables fields:

 db.auth_user.first_name.label=T(First Name)
 etc.
 etc.

 I take some time to figure how get it.

 IDEA: I sugest, to make web2py more friendly to l10n, the labels was default
 as above, so we need only to translate xx-xx.py language file

Really what we can do is use system I createad (class Messages) to do
this on labels too (actually it only storage messages like 'Invalid
email', 'Invalid login' etc.).
I'll work on your idea too (really I was planning to - in new
translation system these messages are inserted in lang files when it
have to be translated the first time but is more interesting if we
have it inserted by default).

-- 
 Álvaro Justen
 Peta5 - Telecomunicações e Software Livre
 21 3021-6001 / 9898-0141
 http://www.peta5.com.br/

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[web2py:26132] javascript function call from controller

[Julius Minka]

Hi all,

I have a javascript function in html file which is usually called from 
onclick event in the same file. It works fine.
However I would like to call this javascript function from a controller.

More precise description:
after clicking an element in the page, the flow goes to controller. 
There I decide which dialog to display (I have it working to this 
point), but it is defined again in html file as jquery dialog opening 
with .dialog(open);

How to do it?
Julius

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[web2py:26133] Re: ip of a logged-in-user

[Kuba Kucharski]

Hi,

Yes, I've been there.. it generates a lot of updates :/

I thought maybe about some generic js solution already used by
someone, we have dozens of very wise people here, sometimes they point
me in the direction I've never even dreamt of ;)


@speedbird
I was trying to find this functionality in your great pyforum thing,
but couldn't


@all
in the future, shouldn't this be implemented inside welcome app  ?

-- 
Kuba
(pozdrowienia z Warszawy)

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[web2py:26134] Re: dynamic css

[JohnMc]

Before you get too far into it, you might want to take a look at
CleverCSS. (http://sandbox.pocoo.org/clevercss/). Might be able to
incorporate it to save some time.

On Jul 9, 5:06 pm, Jonathan Lundell jlund...@pobox.com wrote:
 On Jul 9, 2009, at 2:26 PM, Speedbird wrote:



  I'd say Safari's caching, it is known that safari does not handle
  changes in certain type of files very well (a feature or a nuisance,
  who knows)..

  Anyway, read here for more 
  info:http://forums.macrumors.com/showthread.php?t=73360

 It wasn't caching; I could see the proper file content via Safari's  
 inspect-element function.

 It turned out that I had to override the content-type to be text/css.

 I *am* going to have to deal with caching, though. As a dynamic page,  
 it's specifying no caching at all, which is not what you really want  
 for css.



  -- Julio

  On Jul 9, 2:16 pm, Jonathan Lundell jlund...@pobox.com wrote:
  I'd like to generate my CSS dynamically, using web2py's views syntax
  (mainly for macro substitution, dynamic substitution of colors, stuff
  like that).

  So I created a controller named css, with a method called base, and a
  view named base.css. I then changed layout html to ask for /app/css/
  base.css for its stylesheet.

  Miraculously, everything works: except that my browser (Safari 4.0.2)
  won't use the resulting stylesheet, even though, near as I can tell,
  it looks fine.

  Any suggestions?
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[web2py:26135] Re: web2py based queue

[kralin]

I'm actually using the web2py cron.
Is there a way I can launch the cron external process by the action,
without waiting for the 60 seconds?

On Jul 10, 3:30 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 You can use web2py cron and trigger the processing immediately after
 the action that queues the tasks returns.

 Massimo

 On Jul 10, 8:11 am, kralin andrea.pierle...@gmail.com wrote:

  I finally made it, at least for now.

  There is a database table where all the processes are stored, both to
  be processed and completed ones.

  db.define_table('work',
                  SQLField('name','string'),
                  SQLField('status','string'),
                  SQLField('priority','integer'),
                  SQLField('input','text'),
                  SQLField('results','text'),
                  SQLField
  ('date_submitted','datetime',default=datetime.datetime.now()),
                  SQLField('date_completed','datetime'),
                  )

  than there is a cron that each minute look a the table and if there
  are jobs to process runs the first one.

  def process_job():
     queue=db(db.work.status=='to be done').select
  (orderby=db.work.priority)
      ifqueue:
          job=queue[0]
          #do stuff like:
          input_string=job.input
          output_string='Procesed by cron worker : '+str(input_string)
          #submit results
          db.work[job.id]=dict
  (status='completed',results=output_string,date_completed=datetime.datetime.now
  ())
          db.commit()
      return

  the problem with this is that I have to wait one minute for each table
  lookup, and that I'm not sure it will work correctly under WSGI, since
  I do not want to rely on system cron.
  The fastest improvement would be to run all the process inqueueeach
  time the controller is called by the cron,
  one by one, but I'm still convinced that using cron is not the best
  way to do this, even if it works.

  Am I the only one with this kind of issues? If not maybe I can post
  the solution to AlterEgo...

  On Jul 10, 3:19 am, mdipierro mdipie...@cs.depaul.edu wrote:

   You can use the databae as long the objects are serializable

   On Jul 9, 6:00 pm, kralin andrea.pierle...@gmail.com wrote:

thanks massimo, very elegant...
I have to check for the lock thing, otherwise a list is more tha
sufficient for thequeue:

   queue=cache.ram('queue',lambda:[],10**10)
   queue.append(o)
   queue.pop(0)

it should be also very easy to use a priority schedule by appending
[int(priority), task] to thequeuelist.

however I still need to cope with the guy that's going to do the heavy
job.
Is it possibile to set a Worker in web2py that is able to read the
input from thequeueand put the results in a database, or do I have
to launch a cron each minute to check for thequeue?

On 10 Lug, 00:00, mdipierro mdipie...@cs.depaul.edu wrote:

 You can do something like

 classQueue:
     forever = 10**10
     def __init__(self):
         import thread
         self.q=[]
         self.lock=thread.allocate_lock()
     def enque(self,o):
         self.lock.acquire()
         self.q.append(o)
         self.lock.release()
     def dequeue(self):
         self.lock.acquire()
         o = self.q[0]
         del q[0]
         self.lock.release()
         return o
     def __len__(self):
         self.lock.acquire()
         ell=len(self.q)
         self.lock.release()
         return ell

queue=cache.ram('queue',lambda:Queue,Queue.forever)
queue.enqueue('object')
 print len(queue)
 o =queue.dequeue()

 If you define it in a model it will be visible everywhere, including
 cron scripts. I am not sure if the lock is really necessary (because
 of the global interpreter lock) but it is safe.

queue.append(

 On Jul 9, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

  Hi All,
  I'm diving into web2py that at the moment gives me the power and the
  time do a lot of cool things. so thanks a lot to you guys.
  I was wondering if any of you ever had the need to set aqueuefor a
  heavy process.
  Let's suppose I've got one heavy process that takes 2 mins to run 
  on a
  singol-processor machine.
  now if 10 user submit the process at (more or less) the same time, 
  is
  there a way to schedule the process based on the first coming, first
  to have response rule? each of this user should be able to see their
  result once completed or see something likewait, 8 jobs still in
 queue

  I know it can be done easily with external job sheduler, but it will
  require to use a separate process, not beeing portable, and a little
  bit more headhache...

  a quick and dirty solution wuld be to run a cron each, let's say, 2
  mins and if a process isqueue, execute it, but I feel that can be
  done in a much more 

[web2py:26136] ip of a logged-in-user

[Piotr Banaszkiewicz]

 it generates a lot of updates :/
I described solution used by Invision Power Board and other forum engines :)

But, hmm, maybe their solutions are a bit more complicated (PHP, poo!).


Sincerely,
Piotr.

(okolice Oświęcimia również pozdrawiają :] )

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[web2py:26138] Re: javascript function call from controller

[mdipierro]

With the latest trunk you can do

intput name=value id=value /
button onclick=ajax('callback',['value'],':eval')click me/button
div id=target/div

def callback():
 value=request.vars.value
 return jQuery('#target').html(%s) % repr(str(value))

when you click the button it sends the value of value to the callback
function. The function returns a jQuery string and the clients runs
it. The trick here is ajax(...,':eval') which is defined by web2py.

On Jul 10, 8:56 am, Julius Minka j...@minka.sk wrote:
 Hi all,

 I have a javascript function in html file which is usually called from
 onclick event in the same file. It works fine.
 However I would like to call this javascript function from a controller.

 More precise description:
 after clicking an element in the page, the flow goes to controller.
 There I decide which dialog to display (I have it working to this
 point), but it is defined again in html file as jquery dialog opening
 with .dialog(open);

 How to do it?
 Julius
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[web2py:26139] What about backward compatibility?

[Vinicius Assef]

Hi guys.
This message is more about policy rather than technology, ok?

I am new to web2py and did not develop anything with it, yet.
I just read some docs, watched some slides and video tutorials.

As as newcomer Django user too, I could see some changing behaviour
between versions before 1.0. And who can guarantee me it won't happen
after it? Nobody. I don't see some care about backward compatibility
in Django.

What's web2py commitment with backward compatibility?

If I develop code, this code will turn into legacy code in the very
moment it's in production, right?
And some of the worse things on working with customers, is answering
something like: OK, I can make the change you are asking me. But I'll
have to charge an extra bit due to 'technology update'. My customer
doesn't care about it. And he really doesn't have to. It's my
profession. Not his, right?

Consequently, as a professional, I care about maximizing my own time
investment on learning and using languages and frameworks.

As a mainframe professional for 21 years long, even today I am allowed
to run some programs I developed in my early days on IBM MVS operating
system (I'm talking about 1988!). With no change at all. Such
environment is very stable, despite of language evolution. Yes,
languages change there, too. But it's always backward compatible. It's
about maximizing time and money.

Is there anywhere written about it in web2py documentation or website?
I've not found it, yet.
IMHO it's one of the most important issues when some company chooses
some technology to use.

I am not talking about compatiblity among python versions. I know it's
not a web2py issue, but python's. I'm referring about compatibility
among web2py versions, itself.

--
[ ]s
Vinicius Assef.

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[web2py:26140] Re: What about backward compatibility?

[mdipierro]

On Jul 10, 9:12 am, Vinicius Assef vinicius...@gmail.com wrote:
 Hi guys.
 This message is more about policy rather than technology, ok?

 I am new to web2py and did not develop anything with it, yet.
 I just read some docs, watched some slides and video tutorials.

 As as newcomer Django user too, I could see some changing behaviour
 between versions before 1.0. And who can guarantee me it won't happen
 after it? Nobody. I don't see some care about backward compatibility
 in Django.

 What's web2py commitment with backward compatibility?

We are fully committed to backward compatiliby. We never broke it in 2
years. We do not accept patches that break it. That is one of the
reason we call web2py an Enterprise framework. I thought we said
that in the main web page but somehow it disappeared in the last edit.
I will put it back.

 If I develop code, this code will turn into legacy code in the very
 moment it's in production, right?
 And some of the worse things on working with customers, is answering
 something like: OK, I can make the change you are asking me. But I'll
 have to charge an extra bit due to 'technology update'. My customer
 doesn't care about it. And he really doesn't have to. It's my
 profession. Not his, right?

 Consequently, as a professional, I care about maximizing my own time
 investment on learning and using languages and frameworks.

 As a mainframe professional for 21 years long, even today I am allowed
 to run some programs I developed in my early days on IBM MVS operating
 system (I'm talking about 1988!). With no change at all. Such
 environment is very stable, despite of language evolution. Yes,
 languages change there, too. But it's always backward compatible. It's
 about maximizing time and money.

 Is there anywhere written about it in web2py documentation or website?
 I've not found it, yet.
 IMHO it's one of the most important issues when some company chooses
 some technology to use.

 I am not talking about compatiblity among python versions. I know it's
 not a web2py issue, but python's. I'm referring about compatibility
 among web2py versions, itself.

 --
 [ ]s
 Vinicius Assef.
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[web2py:26141] Re: javascript function call from controller

[Julius Minka]

JohnMc,

decision is made based on data in db related to current screen.

Julius


JohnMc  wrote / napísal(a):
 Julius,
 
 Unless you are performing a server side lookup why not decide the
 dialog to present using a clientside if or switch in javascript?
 
 On Jul 10, 8:56 am, Julius Minka j...@minka.sk wrote:
 Hi all,

 I have a javascript function in html file which is usually called from
 onclick event in the same file. It works fine.
 However I would like to call this javascript function from a controller.

 More precise description:
 after clicking an element in the page, the flow goes to controller.
 There I decide which dialog to display (I have it working to this
 point), but it is defined again in html file as jquery dialog opening
 with .dialog(open);

 How to do it?
 Julius
  


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[web2py:26142] Re: What about backward compatibility?

[viniciusban]

On Jul 10, 11:26 am, mdipierro mdipie...@cs.depaul.edu wrote:
 On Jul 10, 9:12 am, Vinicius Assef vinicius...@gmail.com wrote:

  What's web2py commitment with backward compatibility?

 We are fully committed to backward compatiliby. We never broke it in 2
 years. We do not accept patches that break it. That is one of the
 reason we call web2py an Enterprise framework. I thought we said
 that in the main web page but somehow it disappeared in the last edit.
 I will put it back.

Massimo, thank you for your immediate answer.

I think it is a common shortcomming to companies when they choose to
adopt new technologies.

When a big company takes care of some peace of software, i.e, IBM,
customers know this is on way.
But, actually, this is not web2py's situation, right?

I would put it in web2py homepage and I'd enphasize it. With all
capital letters, colorful, and blinking! (just a joke)

Just saying enterprise framework, can mean able to work with large
teams, or good methods, or distributed teams, maybe rapid
development, even stardards compliant, but not backward compatible.

I'd also say there what you wrote: We never broke it in 2 years.
It's worth reading. :-)

Backward compatibility is very, very important. Really.
I've worked to big telecom companies, here in Brazil, and this topic
was decisive to make some choices. Frequently, money was not the
problem. Lifetime cicle was. Despite technology or simplicity.

Congratulations.
+1 point to web2py. ;-)

--
[ ]s
Vinicius Assef.

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[web2py:26143] Re: dynamic css

[Jonathan Lundell]

On Jul 10, 2009, at 7:03 AM, JohnMc wrote:

 Before you get too far into it, you might want to take a look at
 CleverCSS. (http://sandbox.pocoo.org/clevercss/). Might be able to
 incorporate it to save some time.

Nice, but I'm not sure it's compelling. And you'd still need to serve  
up a dynamic CSS file.

My needs aren't all that complex, basically a macro facility for  
controlling colors and fonts without having to do a big search   
replace. The native CSS way to do this is (for example):

h1,h2,h3,h4,.headerclass { font-family: some header fonts; }

h1 { the rest of h1 }

h2 { the rest of h2 }

etc

But in a big file this gets to be very confusing, with definitions  
fragmented all over the place. So if I define the font family either  
as {{variables}} at the front of the file or in the controller, I can  
use:

h1 {
{{header_font_family}}
}

or the like. The nice thing about the web2py setup is that the whole  
mechanism is already available and well-known--nothing new to learn.

For the record, here's what I ended up with. I made a controller  
called 'css' containing code like this, one method per css file  
(nothing in the dict yet, but that might be a good way to communicate  
my css parameters):

def base():
 response.headers['Content-Type']='text/css'   this was the  
necessary trick
 return dict()

There's a corresponding view called css/base.css (no embedded code  
yet; other than that, it's just a stock CSS file):

body { font-family: Verdana, sans-serif; }
div.beautify td { padding-top: 0; }

Then in layout.html, instead of:

link rel=stylesheet media=screen,projection type=text/css  
href={{=URL(request.application,'static','base.css')}} /

we have:

link rel=stylesheet media=screen,projection type=text/css  
href={{=URL(request.application,'css','base.css')}} /

That's all there is to it, with one exception that I haven't worked  
out yet: the dynamic file is marked as uncached, and that's pretty  
inefficient for CSS if your CSS isn't really dynamic page-to-page,  
which mine is not. I'm assuming that I can edit the response headers  
to specify a ttl. But that's an optimization, and not needed for  
functionality.

I could imagine that web2py might want to do this automatically, and  
adjust the default response headers based on the .css extension of the  
view.

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[web2py:26144] Re: web2py based queue

[mdipierro]

I know there is but I do not recall how. Achipa wrote this. pehaps he
can enlighten us.

On Jul 10, 9:07 am, kralin andrea.pierle...@gmail.com wrote:
 I'm actually using the web2py cron.
 Is there a way I can launch the cron external process by the action,
 without waiting for the 60 seconds?

 On Jul 10, 3:30 pm, mdipierro mdipie...@cs.depaul.edu wrote:

  You can use web2py cron and trigger the processing immediately after
  the action that queues the tasks returns.

  Massimo

  On Jul 10, 8:11 am, kralin andrea.pierle...@gmail.com wrote:

   I finally made it, at least for now.

   There is a database table where all the processes are stored, both to
   be processed and completed ones.

   db.define_table('work',
   SQLField('name','string'),
   SQLField('status','string'),
   SQLField('priority','integer'),
   SQLField('input','text'),
   SQLField('results','text'),
   SQLField
   ('date_submitted','datetime',default=datetime.datetime.now()),
   SQLField('date_completed','datetime'),
   )

   than there is a cron that each minute look a the table and if there
   are jobs to process runs the first one.

   def process_job():
  queue=db(db.work.status=='to be done').select
   (orderby=db.work.priority)
   ifqueue:
   job=queue[0]
   #do stuff like:
   input_string=job.input
   output_string='Procesed by cron worker : '+str(input_string)
   #submit results
   db.work[job.id]=dict
   (status='completed',results=output_string,date_completed=datetime.datetime.now
   ())
   db.commit()
   return

   the problem with this is that I have to wait one minute for each table
   lookup, and that I'm not sure it will work correctly under WSGI, since
   I do not want to rely on system cron.
   The fastest improvement would be to run all the process inqueueeach
   time the controller is called by the cron,
   one by one, but I'm still convinced that using cron is not the best
   way to do this, even if it works.

   Am I the only one with this kind of issues? If not maybe I can post
   the solution to AlterEgo...

   On Jul 10, 3:19 am, mdipierro mdipie...@cs.depaul.edu wrote:

You can use the databae as long the objects are serializable

On Jul 9, 6:00 pm, kralin andrea.pierle...@gmail.com wrote:

 thanks massimo, very elegant...
 I have to check for the lock thing, otherwise a list is more tha
 sufficient for thequeue:

queue=cache.ram('queue',lambda:[],10**10)
queue.append(o)
queue.pop(0)

 it should be also very easy to use a priority schedule by appending
 [int(priority), task] to thequeuelist.

 however I still need to cope with the guy that's going to do the heavy
 job.
 Is it possibile to set a Worker in web2py that is able to read the
 input from thequeueand put the results in a database, or do I have
 to launch a cron each minute to check for thequeue?

 On 10 Lug, 00:00, mdipierro mdipie...@cs.depaul.edu wrote:

  You can do something like

  classQueue:
  forever = 10**10
  def __init__(self):
  import thread
  self.q=[]
  self.lock=thread.allocate_lock()
  def enque(self,o):
  self.lock.acquire()
  self.q.append(o)
  self.lock.release()
  def dequeue(self):
  self.lock.acquire()
  o = self.q[0]
  del q[0]
  self.lock.release()
  return o
  def __len__(self):
  self.lock.acquire()
  ell=len(self.q)
  self.lock.release()
  return ell

 queue=cache.ram('queue',lambda:Queue,Queue.forever)
 queue.enqueue('object')
  print len(queue)
  o =queue.dequeue()

  If you define it in a model it will be visible everywhere, including
  cron scripts. I am not sure if the lock is really necessary (because
  of the global interpreter lock) but it is safe.

 queue.append(

  On Jul 9, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

   Hi All,
   I'm diving into web2py that at the moment gives me the power and 
   the
   time do a lot of cool things. so thanks a lot to you guys.
   I was wondering if any of you ever had the need to set aqueuefor a
   heavy process.
   Let's suppose I've got one heavy process that takes 2 mins to run 
   on a
   singol-processor machine.
   now if 10 user submit the process at (more or less) the same 
   time, is
   there a way to schedule the process based on the first coming, 
   first
   to have response rule? each of this user should be able to see 
   their
   result once completed or see something likewait, 8 jobs still in
  queue

   I know it can be done easily with external job sheduler, but it 

[web2py:26145] Re: Upload with previously used but removed applicationname

[Hans]

Problem was that in web2py/deposit/ there was the ips.w2p file with
owner root rather than the web2py user...maybe through manual copy...
changed owner and now its working like it should.

Thanks Massimo for pointing me into the right folder!

On Jul 9, 10:47 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 odd. tehcnically uploaded files go in web2py/deposit/ before being
 unpacked

 On Jul 9, 2:39 pm, Hans johann.scheibelho...@easytouch-edv.com
 wrote:

  This has low priority for me because of possible workaround below -
  don't spend much time on this.

  I use pack-all on a windows development pc and try to upload the
  ips.w2p on the ubuntu production server (after having used uninstall
  'ips'). all in web2py admin/default/site web interface.
  when I upload the file with the same name (rename it field 'ips') then
  I get a flash response: unable to install ips.
  uploading the same file with another name (like 'xps') works.
  so I just go on linux shell and rename it e.g. mv ./xps ./ips to work
  around the problem.
  the folder ips does not exist on linux any more after the uninstall
  via admin interface. also changing the name of the file ips.w2p does
  not make a difference.

  are (old) application names in web2py stored somewhere else too?

  any other idea?

  both systems are on web2py 1.65.1
  development on win XP
  production on ubuntu

  Hans


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[web2py:26146] Re: What about backward compatibility?

[mdipierro]

OK. check out web2py.com, the second item after the slides.

On Jul 10, 10:02 am, viniciusban vinicius...@gmail.com wrote:
 On Jul 10, 11:26 am, mdipierro mdipie...@cs.depaul.edu wrote:

  On Jul 10, 9:12 am, Vinicius Assef vinicius...@gmail.com wrote:

   What's web2py commitment with backward compatibility?

  We are fully committed to backward compatiliby. We never broke it in 2
  years. We do not accept patches that break it. That is one of the
  reason we call web2py an Enterprise framework. I thought we said
  that in the main web page but somehow it disappeared in the last edit.
  I will put it back.

 Massimo, thank you for your immediate answer.

 I think it is a common shortcomming to companies when they choose to
 adopt new technologies.

 When a big company takes care of some peace of software, i.e, IBM,
 customers know this is on way.
 But, actually, this is not web2py's situation, right?

 I would put it in web2py homepage and I'd enphasize it. With all
 capital letters, colorful, and blinking! (just a joke)

 Just saying enterprise framework, can mean able to work with large
 teams, or good methods, or distributed teams, maybe rapid
 development, even stardards compliant, but not backward compatible.

 I'd also say there what you wrote: We never broke it in 2 years.
 It's worth reading. :-)

 Backward compatibility is very, very important. Really.
 I've worked to big telecom companies, here in Brazil, and this topic
 was decisive to make some choices. Frequently, money was not the
 problem. Lifetime cicle was. Despite technology or simplicity.

 Congratulations.
 +1 point to web2py. ;-)

 --
 [ ]s
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[web2py:26147] Re: web2py based queue

[AchipA]

You could try something like this - not too clean but, good for
kicking off async tasks in another thread after the page has been
served.

import gluon.contrib.wsgihooks as wsgihooks

class myasynctask(wsgihooks.PostConnectionTask):
def __init__(self):
wsgihooks.PostConnectionTask.__init__(self)

def run(self):
my_call_start_queue()

def my_controller():
do_other_stuff()
wsgihooks.localposttasks.append (myasynctask())
return dict(myresult='myresult')

Note that if your web server kills processes that work too long you'll
have to increase the timeout.

On Jul 10, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:
 I'm actually using the web2py cron.
 Is there a way I can launch the cron external process by the action,
 without waiting for the 60 seconds?

 On Jul 10, 3:30 pm, mdipierro mdipie...@cs.depaul.edu wrote:

  You can use web2py cron and trigger the processing immediately after
  the action that queues the tasks returns.

  Massimo

  On Jul 10, 8:11 am, kralin andrea.pierle...@gmail.com wrote:

   I finally made it, at least for now.

   There is a database table where all the processes are stored, both to
   be processed and completed ones.

   db.define_table('work',
                   SQLField('name','string'),
                   SQLField('status','string'),
                   SQLField('priority','integer'),
                   SQLField('input','text'),
                   SQLField('results','text'),
                   SQLField
   ('date_submitted','datetime',default=datetime.datetime.now()),
                   SQLField('date_completed','datetime'),
                   )

   than there is a cron that each minute look a the table and if there
   are jobs to process runs the first one.

   def process_job():
      queue=db(db.work.status=='to be done').select
   (orderby=db.work.priority)
       ifqueue:
           job=queue[0]
           #do stuff like:
           input_string=job.input
           output_string='Procesed by cron worker : '+str(input_string)
           #submit results
           db.work[job.id]=dict
   (status='completed',results=output_string,date_completed=datetime.datetime.now
   ())
           db.commit()
       return

   the problem with this is that I have to wait one minute for each table
   lookup, and that I'm not sure it will work correctly under WSGI, since
   I do not want to rely on system cron.
   The fastest improvement would be to run all the process inqueueeach
   time the controller is called by the cron,
   one by one, but I'm still convinced that using cron is not the best
   way to do this, even if it works.

   Am I the only one with this kind of issues? If not maybe I can post
   the solution to AlterEgo...

   On Jul 10, 3:19 am, mdipierro mdipie...@cs.depaul.edu wrote:

You can use the databae as long the objects are serializable

On Jul 9, 6:00 pm, kralin andrea.pierle...@gmail.com wrote:

 thanks massimo, very elegant...
 I have to check for the lock thing, otherwise a list is more tha
 sufficient for thequeue:

queue=cache.ram('queue',lambda:[],10**10)
queue.append(o)
queue.pop(0)

 it should be also very easy to use a priority schedule by appending
 [int(priority), task] to thequeuelist.

 however I still need to cope with the guy that's going to do the heavy
 job.
 Is it possibile to set a Worker in web2py that is able to read the
 input from thequeueand put the results in a database, or do I have
 to launch a cron each minute to check for thequeue?

 On 10 Lug, 00:00, mdipierro mdipie...@cs.depaul.edu wrote:

  You can do something like

  classQueue:
      forever = 10**10
      def __init__(self):
          import thread
          self.q=[]
          self.lock=thread.allocate_lock()
      def enque(self,o):
          self.lock.acquire()
          self.q.append(o)
          self.lock.release()
      def dequeue(self):
          self.lock.acquire()
          o = self.q[0]
          del q[0]
          self.lock.release()
          return o
      def __len__(self):
          self.lock.acquire()
          ell=len(self.q)
          self.lock.release()
          return ell

 queue=cache.ram('queue',lambda:Queue,Queue.forever)
 queue.enqueue('object')
  print len(queue)
  o =queue.dequeue()

  If you define it in a model it will be visible everywhere, including
  cron scripts. I am not sure if the lock is really necessary (because
  of the global interpreter lock) but it is safe.

 queue.append(

  On Jul 9, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

   Hi All,
   I'm diving into web2py that at the moment gives me the power and 
   the
   time do a lot of cool things. so thanks a lot to you guys.
   I was wondering if any of you ever had the need to set aqueuefor a
   heavy process.
   

[web2py:26148] Re: dynamic css

[Álvaro Justen [Turicas]]

On Fri, Jul 10, 2009 at 12:14, Jonathan Lundelljlund...@pobox.com wrote:

 On Jul 10, 2009, at 7:03 AM, JohnMc wrote:

 Before you get too far into it, you might want to take a look at
 CleverCSS. (http://sandbox.pocoo.org/clevercss/). Might be able to
 incorporate it to save some time.

 Nice, but I'm not sure it's compelling. And you'd still need to serve
 up a dynamic CSS file.

 My needs aren't all that complex, basically a macro facility for
 controlling colors and fonts without having to do a big search 
 replace. The native CSS way to do this is (for example):

 h1,h2,h3,h4,.headerclass { font-family: some header fonts; }

 h1 { the rest of h1 }

 h2 { the rest of h2 }

 etc

 But in a big file this gets to be very confusing, with definitions
 fragmented all over the place. So if I define the font family either
 as {{variables}} at the front of the file or in the controller, I can
 use:

 h1 {
        {{header_font_family}}
 }

 or the like. The nice thing about the web2py setup is that the whole
 mechanism is already available and well-known--nothing new to learn.

 For the record, here's what I ended up with. I made a controller
 called 'css' containing code like this, one method per css file
 (nothing in the dict yet, but that might be a good way to communicate
 my css parameters):

 def base():
     response.headers['Content-Type']='text/css'   this was the
 necessary trick
     return dict()

 There's a corresponding view called css/base.css (no embedded code
 yet; other than that, it's just a stock CSS file):

 body { font-family: Verdana, sans-serif; }
 div.beautify td { padding-top: 0; }

 Then in layout.html, instead of:

 link rel=stylesheet media=screen,projection type=text/css
 href={{=URL(request.application,'static','base.css')}} /

 we have:

 link rel=stylesheet media=screen,projection type=text/css
 href={{=URL(request.application,'css','base.css')}} /

 That's all there is to it, with one exception that I haven't worked
 out yet: the dynamic file is marked as uncached, and that's pretty
 inefficient for CSS if your CSS isn't really dynamic page-to-page,
 which mine is not. I'm assuming that I can edit the response headers
 to specify a ttl. But that's an optimization, and not needed for
 functionality.

 I could imagine that web2py might want to do this automatically, and
 adjust the default response headers based on the .css extension of the
 view.

You can test setting HTTP header Pragma to 'no-cache' as W3C says[1]
or if you are suspecting that web2py is setting headers in a way you
don't want you could view headers (using Firefox addon Live HTTP
Headers, wget etc.) to make sure it's ok. An example:

code
alv...@estavel:~$ wget --server-response http://localhost:8000
--2009-07-10 12:40:16--  http://localhost:8000/
Resolving localhost... 127.0.0.1
Connecting to localhost|127.0.0.1|:8000... connected.
HTTP request sent, awaiting response...
  HTTP/1.1 303 SEE OTHER
  Content-Type: text/html; charset=UTF-8
  Location: /welcome/default/index
  Date: Fri, 10 Jul 2009 15:40:16 GMT
  Server: CherryPy/3.1.0beta3 WSGI Server
Location: /welcome/default/index [following]
--2009-07-10 12:40:16--  http://localhost:8000/welcome/default/index
Connecting to localhost|127.0.0.1|:8000... connected.
HTTP request sent, awaiting response...
  HTTP/1.1 200 OK
  Set-Cookie:  
session_id_welcome=127-0-0-1-def969db-1334-4a49-80cc-5125fa524cf3;
Path=/
  Expires: Fri, 10 Jul 2009 15:40:16 GMT
  Content-Type: text/html; charset=UTF-8
  Pragma: no-cache
  Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
  Date: Fri, 10 Jul 2009 15:40:16 GMT
  Server: CherryPy/3.1.0beta3 WSGI Server
Length: unspecified [text/html]
Saving to: `index'

[ =   ] 5,236
   --.-K/s   in 0s

2009-07-10 12:40:16 (150 MB/s) - `index' saved [5236]

alv...@estavel:~$
/code

When I want to avoid browser's features that I can't control or don't
know how works I simply get page with wget: it is simple and do eactly
what I want. :-)

[1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.32

-- 
 Álvaro Justen
 Peta5 - Telecomunicações e Software Livre
 21 3021-6001 / 9898-0141
 http://www.peta5.com.br/

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[web2py:26149] Re: dynamic css

[Jonathan Lundell]

On Jul 10, 2009, at 8:43 AM, Álvaro Justen [Turicas] wrote:

 You can test setting HTTP header Pragma to 'no-cache' as W3C says[1]
 or if you are suspecting that web2py is setting headers in a way you
 don't want you could view headers (using Firefox addon Live HTTP
 Headers, wget etc.) to make sure it's ok. An example:

I've been using curl -i (include headers) or -I (headers only).

Here's the static css file:

HTTP/1.1 200 OK
Content-Length: 8861
Last-Modified: Sat, 04 Jul 2009 20:17:11 GMT
Pragma: cache
Cache-Control: private
Content-Type: text/css
Date: Thu, 09 Jul 2009 21:58:11 GMT
Server: CherryPy/3.1.0beta3 WSGI Server


Here's the dynamic one (a different file, though, and via Apache; the  
interesting part is the caching):

HTTP/1.1 200 OK
Date: Fri, 10 Jul 2009 16:02:50 GMT
Expires: Fri, 10 Jul 2009 16:02:50 GMT
Pragma: no-cache
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre- 
check=0
Content-Length: 84
Content-Type: text/css


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[web2py:26151] Re: dynamic css

[Álvaro Justen [Turicas]]

On Fri, Jul 10, 2009 at 13:05, Jonathan Lundelljlund...@pobox.com wrote:

 On Jul 10, 2009, at 8:43 AM, Álvaro Justen [Turicas] wrote:

 You can test setting HTTP header Pragma to 'no-cache' as W3C says[1]
 or if you are suspecting that web2py is setting headers in a way you
 don't want you could view headers (using Firefox addon Live HTTP
 Headers, wget etc.) to make sure it's ok. An example:

 I've been using curl -i (include headers) or -I (headers only).

 Here's the static css file:

 HTTP/1.1 200 OK
 Content-Length: 8861
 Last-Modified: Sat, 04 Jul 2009 20:17:11 GMT
 Pragma: cache
 Cache-Control: private
 Content-Type: text/css
 Date: Thu, 09 Jul 2009 21:58:11 GMT
 Server: CherryPy/3.1.0beta3 WSGI Server


 Here's the dynamic one (a different file, though, and via Apache; the
 interesting part is the caching):

 HTTP/1.1 200 OK
 Date: Fri, 10 Jul 2009 16:02:50 GMT
 Expires: Fri, 10 Jul 2009 16:02:50 GMT
 Pragma: no-cache
 Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-
 check=0
 Content-Length: 84
 Content-Type: text/css

1- When you download dynamic file from cURL you get it correctly
(changed as you want)? It generates a ticket?
2- You can change URL of stylesheet so if your browser are doing cache
it won't work for new file. Change 'def base' do 'def testing_css' and
change call to this in layout.html.
3- The dynamic CSS is valid through W3C validator[1]?

[1] http://validator.w3.org/

-- 
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 Peta5 - Telecomunicações e Software Livre
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[web2py:26150] Re: What about backward compatibility?

[viniciusban]

On Jul 10, 12:29 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 OK. check out web2py.com, the second item after the slides.

Nice!
And so quick. :-)

--
[ ]s
Vinicius Assef.

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[web2py:26152] Sending a welcome message but not a cofirm message...

[Jason Brower]

Is there a way with auth to send a welcome message when people register?
Regards,
JAson



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[web2py:26153] Re: eStore appliance

[Benigno]

Hey,

I just happen to have been playing around both with estore and
with the Paypal Engine that Matt did. (I have the same problem you do,
UK is the only country that gets some of googles love in europe, the
rest go way behind, so no google checkout here either). Actually
Google checkout works only in US, UK (and Canada maybe, if I recall
correctly)

Anyways, the Engine that Matt did, does NVP, which allows you to
integrate Paypal to a different level than most people probably need
(which is much more simmilar to what Massimo has on his EStore app).
Right now on the Engine that Matt did, you only have the
DoDirectPayment already setup (which is to process the data of a
transaction for which you hold all the customers data including credit
card etc). If you need to do the whole checkout with Paypal with NVP,
its a longer process, if I remember ok, you actually first stablish a
connection, then you get a token from paypal validating it, you
redirect to a URL with that token, then then you get the validation of
all the data from the customer, then you process your cart confirming
the sale, and get another response giving you the data you would need
to show the customer the receipt... its something like this.

However, there is a very simple way to set it up that works almost
exactly like what Massimo shows for google. I am just in the process
of modifying EStore to put it in place in a very simplified way, but I
am sure you can take it up from there to do whatever you want. I'll
send it to Massimo if its ok, as I am building a bit over his code,
and would rather he posts it if he feels its ok. I'll try to have it
by next monday.

Cheers,
Benigno.

On 4 jul, 06:20, suiato homm...@gmail.com wrote:
 just restarted to work on eStore yesterday, trying to use it as a
 reference for one of my projects.
 it's a good and useful example for me to learn translation and system
 in web2py.

 Google checkout for merchants is still not available in countries
 other than US and UK, though its application pages now appear here in
 Japanese...

 Found an appliancePayPalEngine by Matt Sellers 
 athttp://mdp.cti.depaul.edu/appliances.
 Could be integrated into eStore?

 eStore may be old and need a lot of work to be a full-fledged e-
 commerce appliance. It'd be nice to have it that way,
 but there's another interest in removing fluffy parts and trimming
 down to its skeleton. This way, logics will be revealed
 more clearly, easy to understand the structure, and easy to extend it
 as necessary.

 Dreaming a dream of the skeletal eStore to be applied to various
 devices like iPhone, mobiles, PDA and others without changing its
 logical core...

 --
 Teru

 On 7月4日, 午前1:41, mdipierro mdipie...@cs.depaul.edu wrote:

  eStoreis now an old app. It needs lots of work.

  Massimo

  On Jul 3, 11:36 am, mingodad mingo...@gmail.com wrote:

   I was caught too by the error messages too small or too large
   I sugest to add the folowing to the css part on layout.html:

   .error { background-color: red; color: white; padding: 3px }

   It was borroed from T3, this way the error messages will not pass
   unnoticed.

   As well I'm intrigged why the *_bc fields doesn't get the default
   values like the others !
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[web2py:26154] Re: Sending a welcome message but not a cofirm message...

[mdipierro]

def welcome(form):
auth.settings.mailer.sent(to=form.vars.email,message='Hello %s' %
form.vars.first_name)

auth.settings.register_onaccept = welcome

Need to add this to the book. Thanks for the reminder.

Massimo

On Jul 10, 2:25 pm, Jason Brower encomp...@gmail.com wrote:
 Is there a way with auth to send a welcome message when people register?
 Regards,
 JAson
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[web2py:26155] auth_add_permission()

[Jonathan Lundell]

auth_add_permission() (and its brethren) accept a record_id, or 0 for  
a whole table.

I'm wondering whether it'd be practical to extend that to specify a  
horizontal slice of a table, perhaps defined by the value of a field,  
or more generally a select.

And even more generally, a set of fields from that set of rows.

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[web2py:26156] Re: web2py based queue

[kralin]

thanks a lot AchipA!

On Jul 10, 5:33 pm, AchipA attila.cs...@gmail.com wrote:
 You could try something like this - not too clean but, good for
 kicking off async tasks in another thread after the page has been
 served.

 import gluon.contrib.wsgihooks as wsgihooks

 class myasynctask(wsgihooks.PostConnectionTask):
     def __init__(self):
         wsgihooks.PostConnectionTask.__init__(self)

     def run(self):
         my_call_start_queue()

 def my_controller():
         do_other_stuff()
         wsgihooks.localposttasks.append (myasynctask())
         return dict(myresult='myresult')

 Note that if your web server kills processes that work too long you'll
 have to increase the timeout.

 On Jul 10, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

  I'm actually using the web2py cron.
  Is there a way I can launch the cron external process by the action,
  without waiting for the 60 seconds?

  On Jul 10, 3:30 pm, mdipierro mdipie...@cs.depaul.edu wrote:

   You can use web2py cron and trigger the processing immediately after
   the action that queues the tasks returns.

   Massimo

   On Jul 10, 8:11 am, kralin andrea.pierle...@gmail.com wrote:

I finally made it, at least for now.

There is a database table where all the processes are stored, both to
be processed and completed ones.

db.define_table('work',
                SQLField('name','string'),
                SQLField('status','string'),
                SQLField('priority','integer'),
                SQLField('input','text'),
                SQLField('results','text'),
                SQLField
('date_submitted','datetime',default=datetime.datetime.now()),
                SQLField('date_completed','datetime'),
                )

than there is a cron that each minute look a the table and if there
are jobs to process runs the first one.

def process_job():
   queue=db(db.work.status=='to be done').select
(orderby=db.work.priority)
    ifqueue:
        job=queue[0]
        #do stuff like:
        input_string=job.input
        output_string='Procesed by cron worker : '+str(input_string)
        #submit results
        db.work[job.id]=dict
(status='completed',results=output_string,date_completed=datetime.datetime.now
())
        db.commit()
    return

the problem with this is that I have to wait one minute for each table
lookup, and that I'm not sure it will work correctly under WSGI, since
I do not want to rely on system cron.
The fastest improvement would be to run all the process inqueueeach
time the controller is called by the cron,
one by one, but I'm still convinced that using cron is not the best
way to do this, even if it works.

Am I the only one with this kind of issues? If not maybe I can post
the solution to AlterEgo...

On Jul 10, 3:19 am, mdipierro mdipie...@cs.depaul.edu wrote:

 You can use the databae as long the objects are serializable

 On Jul 9, 6:00 pm, kralin andrea.pierle...@gmail.com wrote:

  thanks massimo, very elegant...
  I have to check for the lock thing, otherwise a list is more tha
  sufficient for thequeue:

 queue=cache.ram('queue',lambda:[],10**10)
 queue.append(o)
 queue.pop(0)

  it should be also very easy to use a priority schedule by appending
  [int(priority), task] to thequeuelist.

  however I still need to cope with the guy that's going to do the 
  heavy
  job.
  Is it possibile to set a Worker in web2py that is able to read the
  input from thequeueand put the results in a database, or do I have
  to launch a cron each minute to check for thequeue?

  On 10 Lug, 00:00, mdipierro mdipie...@cs.depaul.edu wrote:

   You can do something like

   classQueue:
       forever = 10**10
       def __init__(self):
           import thread
           self.q=[]
           self.lock=thread.allocate_lock()
       def enque(self,o):
           self.lock.acquire()
           self.q.append(o)
           self.lock.release()
       def dequeue(self):
           self.lock.acquire()
           o = self.q[0]
           del q[0]
           self.lock.release()
           return o
       def __len__(self):
           self.lock.acquire()
           ell=len(self.q)
           self.lock.release()
           return ell

  queue=cache.ram('queue',lambda:Queue,Queue.forever)
  queue.enqueue('object')
   print len(queue)
   o =queue.dequeue()

   If you define it in a model it will be visible everywhere, 
   including
   cron scripts. I am not sure if the lock is really necessary 
   (because
   of the global interpreter lock) but it is safe.

  queue.append(

   On Jul 9, 4:07 pm, kralin andrea.pierle...@gmail.com wrote:

Hi All,
I'm diving into web2py that at the 

[web2py:26157] Re: javascript function call from controller

[Julius Minka]

Massimo,
I can see following:

1. in Jquery documentation:
html(val)
Set the html contents of every matched element. This property is not 
available on XML documents (although it will work for XHTML documents).

2. in current svn trunk in web2py_ajax.html something like this:
function ajax(u,s,t) {
   var query=;
   for(i=0; is.length; i++) {
  if(i0) query=query+;
 
query=query+encodeURIComponent(s[i])+=+encodeURIComponent(document.getElementById(s[i]).value);
   }
   jQuery.ajax({type: POST, url: u, data: query, success: 
function(msg) { if(t==':eval') eval(msg); else 
document.getElementById(t).innerHTML=msg; } });
}

BUT:
I still do not understand, how it should help me to call javascript 
function from controller.
Can you please explain it more?
Julius

mdipierro  wrote / napísal(a):
 With the latest trunk you can do
 
 intput name=value id=value /
 button onclick=ajax('callback',['value'],':eval')click me/button
 div id=target/div
 
 def callback():
  value=request.vars.value
  return jQuery('#target').html(%s) % repr(str(value))
 
 when you click the button it sends the value of value to the callback
 function. The function returns a jQuery string and the clients runs
 it. The trick here is ajax(...,':eval') which is defined by web2py.
 
 On Jul 10, 8:56 am, Julius Minka j...@minka.sk wrote:
 Hi all,

 I have a javascript function in html file which is usually called from
 onclick event in the same file. It works fine.
 However I would like to call this javascript function from a controller.

 More precise description:
 after clicking an element in the page, the flow goes to controller.
 There I decide which dialog to display (I have it working to this
 point), but it is defined again in html file as jquery dialog opening
 with .dialog(open);



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[web2py:26158] Re: drop-box that keeps previous value

[Yarko Tymciurak]

On Fri, Jul 10, 2009 at 8:07 AM, mdipierro mdipie...@cs.depaul.edu wrote:


 We could make keepvalues take a list of file names.


...you mean a list of fields, correct?   Anyway, that is what Annet is
asking for I think.




 On Jul 10, 1:16 am, annet annet.verm...@gmail.com wrote:
   The question to ask here is what would it take to have a drop box keep
 the
   previous value as default.
 
  It was just a thought. While entering data into a timetable table I
  found it inconvenient that I had to select the day time and again from
  the drop box, which defaults to Monday. Same thing when I entered data
  into a table that contains the opening hours of a creche facility in a
  fitness and health club. In this case I would like to keep the day
  (defaults to Monday) and the facility (ordered alphabetically), not
  the time fields. As I said, just a thought to improve usability to the
  user.
 
   This should be a relatively simple quesition if you are talking about a
   value last saved - boiling down to now that I've selected / retrieved
 the
   last value, how do I programmatically set that as the default in the
 form?
 
  The problem is I lack the proficiency in Python to program something
  like this myself. Becoming proficient in Python figures highest on my
  to do list, e.g. I need validators based on key value pairs in query
  results, not being able to program them myself is rather
  frustrating
 
   Try if form.accepts(...,keepvalues=True) does what you ask.
 
  keepvalues=True keeps all the values, whereas I only want to keep
  specific values.
 
  Kind regards,
 
  Annet.
 


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[web2py:26159] Re: ip of a logged-in-user

[Yarko Tymciurak]

On Fri, Jul 10, 2009 at 8:58 AM, Kuba Kucharski kuba.kuchar...@gmail.comwrote:


 Hi,

 Yes, I've been there.. it generates a lot of updates :/


what about a cache-db for this (an in-memory model) ?





 I thought maybe about some generic js solution already used by
 someone, we have dozens of very wise people here, sometimes they point
 me in the direction I've never even dreamt of ;)


 @speedbird
 I was trying to find this functionality in your great pyforum thing,
 but couldn't


 @all
 in the future, shouldn't this be implemented inside welcome app  ?

 --
 Kuba
 (pozdrowienia z Warszawy)

 


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[web2py:26160] Re: drop-box that keeps previous value

[annet]

 ...you mean a list of fields, correct?   Anyway, that is what Annet is
 asking for I think.

Yes, a list of fields that should keep their previous values when the
form reloads.

Something like keepvalues=[field2,field4]


Annet.
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[web2py:26161] Re: What about backward compatibility?

[Yarko Tymciurak]

The concepts you discuss are... one perspective, one sided (even if
important).

Backward compatibility is (in the big picture) a double-edged sword.

Yes, Massimo is dedicated to backward compatibility, but Python 3 is not.
Python not being so wed to backward compatibility has it's benefits (see
http://reinout.vanrees.org/weblog/2009/07/01/ep-bruce-eckel.html and
http://www.artima.com/weblogs/viewpost.jsp?thread=260578 for example).

Certainly, from web2py's end, backward compatibility is a goal.  How many
people still run Python 1.6 code, without having migrated it forward (can I
see a show of hands?) --- That's my point.   When Python 3 moves into the
forefront, you may need to make small changes, but this is not the kinds of
rewrites you are talking about, where your clients don't care.   This is
practically backward compatible in that nothing devastating or earth
shaking takes place.

This is probably the same approach to expect here.   Backward compatibility
is a goal... But you are not encouraged to use T2 (anymore); there are
better ways now.  Yes, it will still run.   And DAL will change, for the
better.  ... and so on.

The point is to keep making sense - consider the client, the developer,
AND forward progress, and strike that balance of concerns.  (That, after
all, is what intentional design is - consider the involved parties, and
balancing concerns).

- Yarko

On Fri, Jul 10, 2009 at 11:08 AM, viniciusban vinicius...@gmail.com wrote:




 On Jul 10, 12:29 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  OK. check out web2py.com, the second item after the slides.

 Nice!
 And so quick. :-)

 --
 [ ]s
 Vinicius Assef.

 


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[web2py:26162] ssh tunnel from windows (putty) client [ security and admin ]

[Jeffield]

goal: to be able to publicly view the admin interface from a windows
client.
( my web2py server is running on a linux)

the instructions in this page are very good.
http://mdp.cti.depaul.edu/AlterEgo/default/show/68

However, how can I make an ssh tunnel in windows? ( note: putty is
installed)

Thanks
Jeff
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[web2py:26163] Re: web2py cache

[krista]

Is there a way to just cache the object and not the function?

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[web2py:26165] Re: ssh tunnel from windows (putty) client [ security and admin ]

[Alexandre Andrade]

You should save the information of the connection (session) and from the
left side (below categories),

Connection-SSH-Tunnels: (look at the right side now)

Add new forwarded port:

Source Port (8000) or the port you use in web2py
Destination (localhost:8000) or the port you use in web2py

Click add and go back to session (left side) and save session again.

Now you can just open the connection, login, password and access
http://localhost:8000/admin from your browser.






2009/7/10 Jeffield jeff.sheffi...@gmail.com


 goal: to be able to publicly view the admin interface from a windows
 client.
 ( my web2py server is running on a linux)

 the instructions in this page are very good.
 http://mdp.cti.depaul.edu/AlterEgo/default/show/68

 However, how can I make an ssh tunnel in windows? ( note: putty is
 installed)

 Thanks
 Jeff
 



-- 
Atenciosamente

-- 
=
Alexandre Andrade
Hipercenter.com

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[web2py:26166] Re: DAL remote control

[rb]

Thx for the review of my idea. For what it's worth, Here is a sample
of my code which uses 'eval' to create the DAL code:
The input args are the db object, a db.tbl object, and a string of
comma
separated DAL-type field specifiers (eg. db.myTbl.person,
db.myTbl.dog...)

---
def Select(db, tbl, selectStr):
if (selectStr == '') or (selectStr == 'ALL'):
rows = db().select(tbl.ALL)
else:
selectFldStrs = selectStr.split(',')
selectFlds = [eval(fldstr) for fldstr in selectFldStrs]
rows = db().select(*selectFlds)
return rows.response
---

On Jul 10, 6:19 am, mdipierro mdipie...@cs.depaul.edu wrote:
 There is no eval in DAL. Actually b) is safer. The overhead is
 negligible compared to the database IO times. You are doing the right
 thing

 On Jul 10, 1:55 am, rb rbspg...@gmail.com wrote:

  Thx for the speedy reply. Here's another question:

  3) Because I'm doing a thick client, it creates db queries (SQL CRUD)
  which need to be communicated back to the controller which must query
  the db. The two ways to do this are:

  a) use a SQL statement within a executesql command, or

  b) create a DAL row selection criteria string and a column selection
  criteria string, send them back to the controller which feeds them
  through a python eval statement within a DAL function.

  It is always pointed out that b) is dangerous because it's possible
  for unintended string matter to get fed into the eval - which can reek
  havoc. However only *my* strings from the client which I have
  carefully massaged will ever be sent (e.g. I collect the column names
  from the db beforehand and provide them to the db().select(fieldnames-
  here) statement). Further, if I craft a SQL string then it too can
  suffer from bad input. I just have to be extra careful when creating
  the query strings.

  However if I use a) then I lose all of the functionality provided by
  the DAL. I've never been a fan of SQL and I'd like to avoid it in
  favour of what the DAL can offer.

  So I've implemented b) and it is working. My questions are:

  i) am I missing the obvious? Is there a much simpler/better way to do
  this?
  ii) does the DAL add much overhead?

  On Jul 9, 9:21 pm, mdipierro mdipie...@cs.depaul.edu wrote:

   On Jul 9, 11:04 pm, rb rbspg...@gmail.com wrote:

Hi all,

I'm using Web2py to serve a wxPython thick client via XMLRPC. I'm
currently using SQLite (I like the zero db config ;-) and I have a few
questions:

1) I have missed how to specify table constraints across several
fields (in SQLite). For example, in a table the primary key consists
of two fields - how do I specify that these two fields must comprise a
UNIQUE value? In other dbs I could use executesql to just give the SQL
commands, but SQLite (unless I'm mistaken) only allows table
constraints within the CREATE TABLE SQL command. So can this be done
in Web2py?

   You cannot create such constraint database side from
   web2py. Your options are:
   1) enforce the constraint at the validators level
   2) create the table outside web2py and set migrate=False

2) I'm confused as to which models get run when a controller is
accessed. If I have db.py and uom.py models and I access the uom
controller, what happens? From stepping thru the debugger I saw db.py
get run first, then uom.py and then uom.py again (weird). I've
simplified things down to just one (db.py) file for now, but I'm
wondering if the infrastructure's intent is to run all model files
upon each and every controller access. Oh, my access of the controller
is via XMLRPC function (if that changes anything).

   All of them. Alphabetically. There has been some discussion on whether
   there should be exceptions to this rule. It would be easy to inplmenet
   but there was no consensus on whether an improvement was necessary.
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[web2py:26167] Re: DAL remote control

[rb]

On Jul 10, 5:48 am, Fran francisb...@googlemail.com wrote:
 On Jul 10, 9:40 am, rb rbspg...@gmail.com wrote:

  I don't have the resources for ajax thin client programming. I'll
  stick with the trials of deploying the thick client.

 I don't think you need full-blown GWT to have an AJAX client.
 jQuery (integrated with Web2Py) allows 'progressive enhancement' of
 plain old HTML to increase interactivity.
 e.g. look at the miracle of the dataTables plugin which I'm just about
 to make use of:http://www.datatables.net/

When I started this project, I asked the marketing folk are you
*sure* that this is only a desktop app and not something which needs
to be webified? They said no no no.. just make it a simple desktop
app. But I knew better, I continued to ask and they would answer that
a desktop app was what was wanted, oh... and can it also work across
the internet too? !...@#$

I had done some mock ups in wxPython and so became familiar with it's
screen layout system. One fellow described the screen layout system as
having a learning curve like a brick wall grin tis true. But in the
end it is still simpler to develop in than css and html webpages, from
the little I know now.

My main design requirement was having a back door. I couldn't forsee
all that was required because a) I didn't know enough, and b)
marketing want something different each week. So I chose Python
because it has every advantage except speed - but I can later on code
time critical stuff in C and plug it in (ie, I have a speed back
door). I mostly just needed a fat client and some kind of db and a
report generator. But when this can it work across the internet too?
noise started getting louder I knew that a web app was the answer.
Upon finding web2py I now have a web server complete with simple db
(in SQLite) which can serve up webservices for my fat client and I'll
use a webpage/html renderer widget in the client to receive the
report web2py view pages. Right now the design calls for an ability
to dial in via modems from a client to the server in order to fetch
batches of data and view reports. So I'm not too concerned about web-
based security.

The important issue here is that I can use a *simple* system which can
get something developed quickly and which allows evolution into
greater complexity/sophistication later. From what I understand,
web2py will work quite well here.

Thank you for the heads-up on considering ajax via jQuery et al. I'll
continue to look into this. Perhaps I can combine the two (ajax pages
and xmlrpc forms). BTW that datatables.net is amazing.

--
Rb



  But wait, I'll also need to generate lots of reports and you could
  burn me with fire before I'll slog through using Crystal Reports for
  this. No, I can use Web2py and python and code up some html reports
  from the db. The entry forms and inquiry forms of the thick client I'm
  doing in wxPython will work fine.

 Even easier if you let Web2Py build these for you via sqlhtml.py :)
 You can AJAXify the forms using jQuery Form plugin if you like...

  I can use xmlrpc for the client-to-
  svr protocol. Who cares if its grossly slow ? (even though I'm led to
  believe that it's not so slow) if it's all on the same machine.

 Same machine = no big issue...JSON is only better for WAN
 performance.

  However, the customer wants to see his reports from his browser out on
  the 'net somewhere. How can I deliver such? Oh look, there's web2py.
  Awesome. In a few short days of reading even *I* can understand how to
  hack something together - and I'm just starting (in python). I've
  still got to watch out for the speed of communication issue but that's
  tomorrow's problem and there won't be a tomorrow if I have to use
  ajax.

 Well, I think that maybe you'd be better with Web2Py/jQuery rather
 than Web2Py/wxPython.
 However what you propose is also ok...

 F
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[web2py:26168] Re: latest sqlhtml.py breaks update function

[Hans Donner]

Yep,

Massimo, your last fix broke it (line 737+), esp the
if not self.errors: ret = true

here ret is set to true where it shouldn't be...


On Fri, Jul 10, 2009 at 3:21 PM, annetannet.verm...@gmail.com wrote:

 Hans,

 What version where you using before (please spicy svn or bazaar/launchpad) ?
 I was using the sqlhtml file that came with the source code of web2py
 version 1.65.0.

 Can you (perhpas) try what version is still working: see 
 eghttp://bazaar.launchpad.net/~mdipierro/web2py/devel/changes?filter_fi...
 (bazaar launchpad) I checked all versions of the sqlhtml.py file from
 1005 upward, version 1011  is the last one that works, version 1013
 breaks the update function, as does version 1014.

 Can you show some simple code that we can use to reproduce this?
 I wanted to update a record using the web2py's admin when I discovered
 that the update function no longer works, my own update functions
 call
 the update function:

 @auth.requires_membership('tier2_manager')
 def update_openinghour():
    response.view='tier1/update.html'
    db.openingstijd.bedrijf.writable=False
    record=db.openingstijd[request.args[0]]
    if not record or not record.bedrijf==auth.user.bedrijf:
        redirect(URL(r=request,f='crud_openinghour'))
    form=update_form(db.openingstijd,record,'crud_openinghour')
    return dict(form=form)
 def update_form(table,rec,nxt):
    form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
    form[0][-1][1].append(INPUT
 (_type='button',_value='Cancel',_onclick='javascript:history.go
 (-1)'))
    return form


 Kind regards,

 Annet.

 


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[web2py:26169] Re: drop-box that keeps previous value

[Yarko Tymciurak]

I think this is generally useful;  in fact an inverse of this is common in
forms you've seen around the net:

For exaample,  register to a site and server validation fails:  you get your
form presented back to you with maybe a few sensitive fields (e.g. password)

On Fri, Jul 10, 2009 at 1:11 PM, annet annet.verm...@gmail.com wrote:



  ...you mean a list of fields, correct?   Anyway, that is what Annet is
  asking for I think.

 Yes, a list of fields that should keep their previous values when the
 form reloads.

 Something like keepvalues=[field2,field4]


something like keepvalues=~[password]






 Annet.
 


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[web2py:26170] Re: eStore appliance

[mdipierro]

I am very much interested in building a new and more powerful eStore.
I think we need to setup a task force of people interested int his and
build one all together. We need somebody willing coordinate and be
project leader.

Massimo

On Jul 10, 11:45 am, Benigno bca...@albendas.com wrote:
 Hey,

     I just happen to have been playing around both with estore and
 with the Paypal Engine that Matt did. (I have the same problem you do,
 UK is the only country that gets some of googles love in europe, the
 rest go way behind, so no google checkout here either). Actually
 Google checkout works only in US, UK (and Canada maybe, if I recall
 correctly)

     Anyways, the Engine that Matt did, does NVP, which allows you to
 integrate Paypal to a different level than most people probably need
 (which is much more simmilar to what Massimo has on his EStore app).
 Right now on the Engine that Matt did, you only have the
 DoDirectPayment already setup (which is to process the data of a
 transaction for which you hold all the customers data including credit
 card etc). If you need to do the whole checkout with Paypal with NVP,
 its a longer process, if I remember ok, you actually first stablish a
 connection, then you get a token from paypal validating it, you
 redirect to a URL with that token, then then you get the validation of
 all the data from the customer, then you process your cart confirming
 the sale, and get another response giving you the data you would need
 to show the customer the receipt... its something like this.

     However, there is a very simple way to set it up that works almost
 exactly like what Massimo shows for google. I am just in the process
 of modifying EStore to put it in place in a very simplified way, but I
 am sure you can take it up from there to do whatever you want. I'll
 send it to Massimo if its ok, as I am building a bit over his code,
 and would rather he posts it if he feels its ok. I'll try to have it
 by next monday.

 Cheers,
 Benigno.

 On 4 jul, 06:20, suiato homm...@gmail.com wrote:

  just restarted to work on eStore yesterday, trying to use it as a
  reference for one of my projects.
  it's a good and useful example for me to learn translation and system
  in web2py.

  Google checkout for merchants is still not available in countries
  other than US and UK, though its application pages now appear here in
  Japanese...

  Found an appliancePayPalEngine by Matt Sellers 
  athttp://mdp.cti.depaul.edu/appliances.
  Could be integrated into eStore?

  eStore may be old and need a lot of work to be a full-fledged e-
  commerce appliance. It'd be nice to have it that way,
  but there's another interest in removing fluffy parts and trimming
  down to its skeleton. This way, logics will be revealed
  more clearly, easy to understand the structure, and easy to extend it
  as necessary.

  Dreaming a dream of the skeletal eStore to be applied to various
  devices like iPhone, mobiles, PDA and others without changing its
  logical core...

  --
  Teru

  On 7月4日, 午前1:41, mdipierro mdipie...@cs.depaul.edu wrote:

   eStoreis now an old app. It needs lots of work.

   Massimo

   On Jul 3, 11:36 am, mingodad mingo...@gmail.com wrote:

I was caught too by the error messages too small or too large
I sugest to add the folowing to the css part on layout.html:

.error { background-color: red; color: white; padding: 3px }

It was borroed from T3, this way the error messages will not pass
unnoticed.

As well I'm intrigged why the *_bc fields doesn't get the default
values like the others !
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[web2py:26171] Re: auth_add_permission()

[mdipierro]

Make a proposal. Perhaps passing a SQLQuery instead of a record id?

On Jul 10, 12:19 pm, Jonathan Lundell jlund...@pobox.com wrote:
 auth_add_permission() (and its brethren) accept a record_id, or 0 for  
 a whole table.

 I'm wondering whether it'd be practical to extend that to specify a  
 horizontal slice of a table, perhaps defined by the value of a field,  
 or more generally a select.

 And even more generally, a set of fields from that set of rows.
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[web2py:26172] Re: javascript function call from controller

[mdipierro]

You cannot call the javascript from the controller. The js calls the
controller, the controller responds with other js that gets executed
by the browser.

On Jul 10, 12:34 pm, Julius Minka j...@minka.sk wrote:
 Massimo,
 I can see following:

 1. in Jquery documentation:
 html(val)
 Set the html contents of every matched element. This property is not
 available on XML documents (although it will work for XHTML documents).

 2. in current svn trunk in web2py_ajax.html something like this:
 function ajax(u,s,t) {
    var query=;
    for(i=0; is.length; i++) {
       if(i0) query=query+;

 query=query+encodeURIComponent(s[i])+=+encodeURIComponent(document.getElementById(s[i]).value);
    }
    jQuery.ajax({type: POST, url: u, data: query, success:
 function(msg) { if(t==':eval') eval(msg); else
 document.getElementById(t).innerHTML=msg; } });

 }

 BUT:
 I still do not understand, how it should help me to call javascript
 function from controller.
 Can you please explain it more?
 Julius

 mdipierro  wrote / napísal(a):

  With the latest trunk you can do

  intput name=value id=value /
  button onclick=ajax('callback',['value'],':eval')click me/button
  div id=target/div

  def callback():
       value=request.vars.value
       return jQuery('#target').html(%s) % repr(str(value))

  when you click the button it sends the value of value to the callback
  function. The function returns a jQuery string and the clients runs
  it. The trick here is ajax(...,':eval') which is defined by web2py.

  On Jul 10, 8:56 am, Julius Minka j...@minka.sk wrote:
  Hi all,

  I have a javascript function in html file which is usually called from
  onclick event in the same file. It works fine.
  However I would like to call this javascript function from a controller.

  More precise description:
  after clicking an element in the page, the flow goes to controller.
  There I decide which dialog to display (I have it working to this
  point), but it is defined again in html file as jquery dialog opening
  with .dialog(open);
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[web2py:26173] Re: ip of a logged-in-user

[mdipierro]

Yes we have that. Look into

gluon.contrib.memdb

On Jul 10, 1:03 pm, Yarko Tymciurak yark...@gmail.com wrote:
 On Fri, Jul 10, 2009 at 8:58 AM, Kuba Kucharski 
 kuba.kuchar...@gmail.comwrote:



  Hi,

  Yes, I've been there.. it generates a lot of updates :/

 what about a cache-db for this (an in-memory model) ?



  I thought maybe about some generic js solution already used by
  someone, we have dozens of very wise people here, sometimes they point
  me in the direction I've never even dreamt of ;)

  @speedbird
  I was trying to find this functionality in your great pyforum thing,
  but couldn't

  @all
  in the future, shouldn't this be implemented inside welcome app  ?

  --
  Kuba
  (pozdrowienia z Warszawy)
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[web2py:26174] Re: What about backward compatibility?

[mdipierro]

web2py is not moving to Python 3. Period. We may have a web3py in the
future while still supporting and improving web2py. That is not a
priority right now.


On Jul 10, 1:20 pm, Yarko Tymciurak yark...@gmail.com wrote:
 The concepts you discuss are... one perspective, one sided (even if
 important).

 Backward compatibility is (in the big picture) a double-edged sword.

 Yes, Massimo is dedicated to backward compatibility, but Python 3 is not.
 Python not being so wed to backward compatibility has it's benefits 
 (seehttp://reinout.vanrees.org/weblog/2009/07/01/ep-bruce-eckel.htmlandhttp://www.artima.com/weblogs/viewpost.jsp?thread=260578for
  example).

 Certainly, from web2py's end, backward compatibility is a goal.  How many
 people still run Python 1.6 code, without having migrated it forward (can I
 see a show of hands?) --- That's my point.   When Python 3 moves into the
 forefront, you may need to make small changes, but this is not the kinds of
 rewrites you are talking about, where your clients don't care.   This is
 practically backward compatible in that nothing devastating or earth
 shaking takes place.

 This is probably the same approach to expect here.   Backward compatibility
 is a goal... But you are not encouraged to use T2 (anymore); there are
 better ways now.  Yes, it will still run.   And DAL will change, for the
 better.  ... and so on.

 The point is to keep making sense - consider the client, the developer,
 AND forward progress, and strike that balance of concerns.  (That, after
 all, is what intentional design is - consider the involved parties, and
 balancing concerns).

 - Yarko

 On Fri, Jul 10, 2009 at 11:08 AM, viniciusban vinicius...@gmail.com wrote:

  On Jul 10, 12:29 pm, mdipierro mdipie...@cs.depaul.edu wrote:
   OK. check out web2py.com, the second item after the slides.

  Nice!
  And so quick. :-)

  --
  [ ]s
  Vinicius Assef.
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[web2py:26180] Re: drop-box that keeps previous value

[mdipierro]

This is more difficult than I thought. It requires major change in
that delicate mechanism that is form validation. It will happen but
not today.

Massimo

On Jul 10, 2:43 pm, Yarko Tymciurak yark...@gmail.com wrote:
 I think this is generally useful;  in fact an inverse of this is common in
 forms you've seen around the net:

 For exaample,  register to a site and server validation fails:  you get your
 form presented back to you with maybe a few sensitive fields (e.g. password)

 On Fri, Jul 10, 2009 at 1:11 PM, annet annet.verm...@gmail.com wrote:

   ...you mean a list of fields, correct?   Anyway, that is what Annet is
   asking for I think.

  Yes, a list of fields that should keep their previous values when the
  form reloads.

  Something like keepvalues=[field2,field4]

 something like keepvalues=~[password]



  Annet.
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[web2py:26181] Re: Sending a welcome message but not a cofirm message...

[mdipierro]

def welcome(form):
auth.settings.mailer.send(to=form.vars.email,message='Hello %s'
%form.vars.first_name)
auth.settings.register_onaccept = welcome

Massimo

On Jul 10, 6:14 pm, Jason Brower encomp...@gmail.com wrote:
 Hmm I get an error. it tells me that there is no sent method.

 Traceback (most recent call last):   File
 /home/encompass/Desktop/web2py/gluon/restricted.py, line 176, in
 restricted     exec ccode in environment   File
 /home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
 line 202, in module   File 
 /home/encompass/Desktop/web2py/gluon/globals.py, line 103, in lambda     
 self._caller = lambda f: f()   File 
 /home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
 line 159, in user     return dict(form = auth())   File 
 /home/encompass/Desktop/web2py/gluon/tools.py, line 466, in __call__     
 return self.register()   File 
 /home/encompass/Desktop/web2py/gluon/tools.py, line 915, in register     
 onaccept(form)   File 
 /home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
 line 13, in welcome     auth.settings.mailer.sent(to=form.vars.email, 
 message='Hello %s' % form.vars.first_name) AttributeError: 'Mail' object has 
 no attribute 'sent'
 Any ideas?
 Regards,
 JAson

 On Fri, 2009-07-10 at 09:56 -0700, mdipierro wrote:
  def welcome(form):
      auth.settings.mailer.sent(to=form.vars.email,message='Hello %s' %
  form.vars.first_name)

  auth.settings.register_onaccept = welcome

  Need to add this to the book. Thanks for the reminder.

  Massimo

  On Jul 10, 2:25 pm, Jason Brower encomp...@gmail.com wrote:
   Is there a way with auth to send a welcome message when people register?
   Regards,
   JAson
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[web2py:26182] Re: sending HTML emails

[mdipierro]

Yarko, I can tell you are still at web2py 1.52. ;-)

Massimo

On Jul 10, 3:15 pm, Yarko Tymciurak yark...@gmail.com wrote:
 See

 http://bazaar.launchpad.net/~yarkot1/web2conf/pycon2009site/annotate/...

 (just use send()  instead of t2.eamil() )

 On Fri, Jul 10, 2009 at 1:31 PM, kralin andrea.pierle...@gmail.com wrote:

  I spent the whole afternoon trying to send an HTML formatted email
  with web2py.
  while I cannote use smtplib directly, cause it seems not to work, and
  I think this should be normal in the framework.
  however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
  it is not possible to alter the content-type, or any other header for
  the email using the gluon.tools.Mail class.
  this happens because anu message that is passed to the mail=Mail()
  object is attached to this string before beeing sent:

  msg = '''From: %s\r
  To: %s\r
  Subject: %s\r
  \r
  %s'''\

  and the double newlines close the headers.

  so it would be very useful to also set at least something link this:

     def send(
         self,
         to,
         subject='None',
         message='None',
         headers='\r\n'
         ):

                 msg = '''From: %s\r
  To: %s\r
  Subject: %s\r
  \r
  %s'''\
                      % (self.settings.sender, ', '.join(to),
  subject,headers,
                         message)

  so that it will be possible to pass directly some header strings or
  pass an empty string as headers, and put them in the message.
  this way they can be correctly recognized.

  hope this helps
  cheers
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[web2py:26185] task forces

[mdipierro]

I think we need to build two task forces.

1) to build a CMS

2) to build a eStore

the more overlap the better. We need two project leaders and
volunteers. I also suggest starting by creating google docs to gather
requirements.

Lots of people needs these, including me.

Massimo
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[web2py:26186] Re: task forces

[Mr admin]

I like the idea! I'd like to be a tester, documenter for the eStore.

Sterling


On Fri, Jul 10, 2009 at 3:32 PM, mdipierro mdipie...@cs.depaul.edu wrote:


 I think we need to build two task forces.

 1) to build a CMS

 2) to build a eStore

 the more overlap the better. We need two project leaders and
 volunteers. I also suggest starting by creating google docs to gather
 requirements.

 Lots of people needs these, including me.

 Massimo
 


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[web2py:26176] Re: Sending a welcome message but not a cofirm message...

[Jason Brower]

Hmm I get an error. it tells me that there is no sent method.

Traceback (most recent call last):   File
/home/encompass/Desktop/web2py/gluon/restricted.py, line 176, in
restricted exec ccode in environment   File
/home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
line 202, in module   File /home/encompass/Desktop/web2py/gluon/globals.py, 
line 103, in lambda self._caller = lambda f: f()   File 
/home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
line 159, in user return dict(form = auth())   File 
/home/encompass/Desktop/web2py/gluon/tools.py, line 466, in __call__ 
return self.register()   File /home/encompass/Desktop/web2py/gluon/tools.py, 
line 915, in register onaccept(form)   File 
/home/encompass/Desktop/web2py/applications/gbata/controllers/default.py, 
line 13, in welcome auth.settings.mailer.sent(to=form.vars.email, 
message='Hello %s' % form.vars.first_name) AttributeError: 'Mail' object has no 
attribute 'sent'
Any ideas?
Regards,
JAson
On Fri, 2009-07-10 at 09:56 -0700, mdipierro wrote:
 def welcome(form):
 auth.settings.mailer.sent(to=form.vars.email,message='Hello %s' %
 form.vars.first_name)
 
 auth.settings.register_onaccept = welcome
 
 Need to add this to the book. Thanks for the reminder.
 
 Massimo
 
 On Jul 10, 2:25 pm, Jason Brower encomp...@gmail.com wrote:
  Is there a way with auth to send a welcome message when people register?
  Regards,
  JAson
  


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[web2py:26179] Re: latest sqlhtml.py breaks update function

[mdipierro]

You are right. I think I fixed the fix and I am uploading 1017. Please
give it a try.

On Jul 10, 2:32 pm, Hans Donner hans.don...@pobox.com wrote:
 Yep,

 Massimo, your last fix broke it (line 737+), esp the
 if not self.errors: ret = true

 here ret is set to true where it shouldn't be...

 On Fri, Jul 10, 2009 at 3:21 PM, annetannet.verm...@gmail.com wrote:

  Hans,

  What version where you using before (please spicy svn or bazaar/launchpad) 
  ?
  I was using the sqlhtml file that came with the source code of web2py
  version 1.65.0.

  Can you (perhpas) try what version is still working: see 
  eghttp://bazaar.launchpad.net/~mdipierro/web2py/devel/changes?filter_fi...
  (bazaar launchpad) I checked all versions of the sqlhtml.py file from
  1005 upward, version 1011  is the last one that works, version 1013
  breaks the update function, as does version 1014.

  Can you show some simple code that we can use to reproduce this?
  I wanted to update a record using the web2py's admin when I discovered
  that the update function no longer works, my own update functions
  call
  the update function:

  @auth.requires_membership('tier2_manager')
  def update_openinghour():
     response.view='tier1/update.html'
     db.openingstijd.bedrijf.writable=False
     record=db.openingstijd[request.args[0]]
     if not record or not record.bedrijf==auth.user.bedrijf:
         redirect(URL(r=request,f='crud_openinghour'))
     form=update_form(db.openingstijd,record,'crud_openinghour')
     return dict(form=form)
  def update_form(table,rec,nxt):
     form=crud.update(table,rec,next=(URL(r=request,f=nxt)))
     form[0][-1][1].append(INPUT
  (_type='button',_value='Cancel',_onclick='javascript:history.go
  (-1)'))
     return form

  Kind regards,

  Annet.
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[web2py:26188] Re: sending HTML emails

[Yarko Tymciurak]

well, web2conf was... I found your update (actually I think its on
launchpad) and it looks like you worked off of something older than what we
ran at the conference, so will need to merge and update all the parts from
last years conference site.

I'll try to do that before you leave so you can have a merged copy on your
trip, for what we discussed yesterday.


On Fri, Jul 10, 2009 at 3:24 PM, mdipierro mdipie...@cs.depaul.edu wrote:


 Yarko, I can tell you are still at web2py 1.52. ;-)

 Massimo

 On Jul 10, 3:15 pm, Yarko Tymciurak yark...@gmail.com wrote:
  See
 
  http://bazaar.launchpad.net/~yarkot1/web2conf/pycon2009site/annotate/.http://bazaar.launchpad.net/%7Eyarkot1/web2conf/pycon2009site/annotate/.
 ..
 
  (just use send()  instead of t2.eamil() )
 
  On Fri, Jul 10, 2009 at 1:31 PM, kralin andrea.pierle...@gmail.com
 wrote:
 
   I spent the whole afternoon trying to send an HTML formatted email
   with web2py.
   while I cannote use smtplib directly, cause it seems not to work, and
   I think this should be normal in the framework.
   however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
   it is not possible to alter the content-type, or any other header for
   the email using the gluon.tools.Mail class.
   this happens because anu message that is passed to the mail=Mail()
   object is attached to this string before beeing sent:
 
   msg = '''From: %s\r
   To: %s\r
   Subject: %s\r
   \r
   %s'''\
 
   and the double newlines close the headers.
 
   so it would be very useful to also set at least something link this:
 
  def send(
  self,
  to,
  subject='None',
  message='None',
  headers='\r\n'
  ):
 
  msg = '''From: %s\r
   To: %s\r
   Subject: %s\r
   \r
   %s'''\
   % (self.settings.sender, ', '.join(to),
   subject,headers,
  message)
 
   so that it will be possible to pass directly some header strings or
   pass an empty string as headers, and put them in the message.
   this way they can be correctly recognized.
 
   hope this helps
   cheers
 


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[web2py:26175] Re: web2py cache

[mdipierro]

You always cache the object returned by the function. The function can
be a dummy that returns the object you want to cache.

On Jul 10, 1:30 pm, krista klarso...@msn.com wrote:
 Is there a way to just cache the object and not the function?
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[web2py:26177] Re: sending HTML emails

[mdipierro]

While this can be and something like this can be added it is my
understanding that you do not need to change the header to send html
emails. You need to use the MIME encoding and that should be
transparent to what mail.send does now. If I am wrong please provide
an example of how to change the headers to send a MIME encoded
message.

On Jul 10, 1:31 pm, kralin andrea.pierle...@gmail.com wrote:
 I spent the whole afternoon trying to send an HTML formatted email
 with web2py.
 while I cannote use smtplib directly, cause it seems not to work, and
 I think this should be normal in the framework.
 however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
 it is not possible to alter the content-type, or any other header for
 the email using the gluon.tools.Mail class.
 this happens because anu message that is passed to the mail=Mail()
 object is attached to this string before beeing sent:

 msg = '''From: %s\r
 To: %s\r
 Subject: %s\r
 \r
 %s'''\

 and the double newlines close the headers.

 so it would be very useful to also set at least something link this:

     def send(
         self,
         to,
         subject='None',
         message='None',
         headers='\r\n'
         ):

                 msg = '''From: %s\r
 To: %s\r
 Subject: %s\r
 \r
 %s'''\
                      % (self.settings.sender, ', '.join(to),
 subject,headers,
                         message)

 so that it will be possible to pass directly some header strings or
 pass an empty string as headers, and put them in the message.
 this way they can be correctly recognized.

 hope this helps
 cheers
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[web2py:26178] Re: sending HTML emails

[Yarko Tymciurak]

See

http://bazaar.launchpad.net/~yarkot1/web2conf/pycon2009site/annotate/head%3A/applications/register/models/db_fa.py

(just use send()  instead of t2.eamil() )

On Fri, Jul 10, 2009 at 1:31 PM, kralin andrea.pierle...@gmail.com wrote:


 I spent the whole afternoon trying to send an HTML formatted email
 with web2py.
 while I cannote use smtplib directly, cause it seems not to work, and
 I think this should be normal in the framework.
 however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
 it is not possible to alter the content-type, or any other header for
 the email using the gluon.tools.Mail class.
 this happens because anu message that is passed to the mail=Mail()
 object is attached to this string before beeing sent:


 msg = '''From: %s\r
 To: %s\r
 Subject: %s\r
 \r
 %s'''\


 and the double newlines close the headers.

 so it would be very useful to also set at least something link this:

def send(
self,
to,
subject='None',
message='None',
headers='\r\n'
):


msg = '''From: %s\r
 To: %s\r
 Subject: %s\r
 \r
 %s'''\
 % (self.settings.sender, ', '.join(to),
 subject,headers,
message)


 so that it will be possible to pass directly some header strings or
 pass an empty string as headers, and put them in the message.
 this way they can be correctly recognized.

 hope this helps
 cheers



 


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[web2py:/] Multithreaded and Multicore Programming/Solutions

[eric cs]

Guys I am not expert just thinking about the Twiiter/Rails problem and
Scala solution and I was wondering that with Python.
I heard the best option to use Web2py is 2.5 and this version doesn't
support same features that take care kind of the Multithreaded and
Multicore problems on Python 2.6 and 3.0.
One of the solutions is parallel program which can run on multiple
cores in Python, does Django does has a better approach to that,
because several apps?
What about those approaches, can someone explain them better,newbie
way:

1-Write a multithreaded program using the threading module and run it
in the IronPython or Jython runtime.
2-Use the processing module, (now included in Python 2.6), to run your
code in multiple processes at once.
3-Use the subprocess module to run multiple python interpreters and
communicate between them.
4-Use Twisted and Ampoule. This has the advantage of not just running
your code across different processes, but (if you don't share access
to things like files) potentially across different computers as well.

I was wondering how are the options to take care of those problems
what are the future?
Looks like Python has way better options that Ruby for now.

Thanks.
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[web2py:26191] Re: task forces

[Vidul]

I've always been on the opinion that MVC like WEB2PY (i.e. a normal
MVC) is a MVC and a CMS in one (probably I am missing some end-users'
points of view).
But eStore - that makes a lot of sense to me, so I am for it.


On Jul 10, 11:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
 Those are bigger, more ambitious projects.

 We could start with something shorter, just to work out the task force
 processes

 Perhaps a web2py resources site, an update to the appliances app could be
 the first part of that (and an update to it).
 This will give us relatively little to do, and we can work out what will
 work:

 I would like to see regular meetings (IRC), and _real_ distance, on-line
 code sprints... so that a 2 hour session will find everyone coding a piece,
 and a leader merging and running it live for all to review, update, etc.
 (leader to push up to a launchpad, or mercurial).

 One of the process things to work out:  stay launchpad, or move
 code.google.com / mercurial.

 The latter would give us (if they've worked it out) a code review site,
 which would be a great way for task force to work asynchronously (e.g. in
 between code-sprint meetings).

 Code sprints would be useful - if the balance on a team was 3 / 2  or so of
 experienced python-web2py-ers, vs people wanting to learn, stretch it would
 be a great way to regularly have a place to join in --- real community
 stuff.

 How does this sound?   A simpler job to work out the basics of the working
 process, find what will work for starters.

 - Yarko



 On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:

  I am in...but no knowledge, just wanna help and learn on the process
  if that is possible, count with me.

  On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
   I think we need to build two task forces.

   1) to build a CMS

   2) to build a eStore

   the more overlap the better. We need two project leaders and
   volunteers. I also suggest starting by creating google docs to gather
   requirements.

   Lots of people needs these, including me.

   Massimo
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[web2py:26192] Re: task forces

[eric cs]

We have to beat them...hehehe
Rails for Spree and Magento for Php/Zend.
At least Magento for inspiration.


On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
 Those are bigger, more ambitious projects.

 We could start with something shorter, just to work out the task force
 processes

 Perhaps a web2py resources site, an update to the appliances app could be
 the first part of that (and an update to it).
 This will give us relatively little to do, and we can work out what will
 work:

 I would like to see regular meetings (IRC), and _real_ distance, on-line
 code sprints... so that a 2 hour session will find everyone coding a piece,
 and a leader merging and running it live for all to review, update, etc.
 (leader to push up to a launchpad, or mercurial).

 One of the process things to work out:  stay launchpad, or move
 code.google.com / mercurial.

 The latter would give us (if they've worked it out) a code review site,
 which would be a great way for task force to work asynchronously (e.g. in
 between code-sprint meetings).

 Code sprints would be useful - if the balance on a team was 3 / 2  or so of
 experienced python-web2py-ers, vs people wanting to learn, stretch it would
 be a great way to regularly have a place to join in --- real community
 stuff.

 How does this sound?   A simpler job to work out the basics of the working
 process, find what will work for starters.

 - Yarko



 On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:

  I am in...but no knowledge, just wanna help and learn on the process
  if that is possible, count with me.

  On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
   I think we need to build two task forces.

   1) to build a CMS

   2) to build a eStore

   the more overlap the better. We need two project leaders and
   volunteers. I also suggest starting by creating google docs to gather
   requirements.

   Lots of people needs these, including me.

   Massimo- Hide quoted text -

 - Show quoted text -
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[web2py:26193] Re: Multithreaded and Multicore Programming/Solutions

[mdipierro]

There is no real problem with python and multi threading (web2py
includes a multithreaded server) except for one issue with the Glbal
Interpreter Lock (i.e. Python multi threaded apps get slower, not
faster the most cores you have unless you lock python on a core, for
example by using a virtual machine). This is not a practical concern
with typical web hosting service where you get assigned one VM. It is
still faster than rails as long as I can tell.

The issues you raise are relavent for high performance computing not
for web development.

web2py runs with Jython out of the box and it does not have the GIL
problem but Jython is very slow. Perhaps things will change in the
future. I know Jruby is faster than CRuby.

Massimo

On Jul 10, 3:54 pm, eric cs eeri...@gmail.com wrote:
 Guys I am not expert just thinking about the Twiiter/Rails problem and
 Scala solution and I was wondering that with Python.
 I heard the best option to use Web2py is 2.5 and this version doesn't
 support same features that take care kind of the Multithreaded and
 Multicore problems on Python 2.6 and 3.0.
 One of the solutions is parallel program which can run on multiple
 cores in Python, does Django does has a better approach to that,
 because several apps?
 What about those approaches, can someone explain them better,newbie
 way:

 1-Write a multithreaded program using the threading module and run it
 in the IronPython or Jython runtime.
 2-Use the processing module, (now included in Python 2.6), to run your
 code in multiple processes at once.
 3-Use the subprocess module to run multiple python interpreters and
 communicate between them.
 4-Use Twisted and Ampoule. This has the advantage of not just running
 your code across different processes, but (if you don't share access
 to things like files) potentially across different computers as well.

 I was wondering how are the options to take care of those problems
 what are the future?
 Looks like Python has way better options that Ruby for now.

 Thanks.
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[web2py:26194] Check out your web2py app in multiple environments

[Yarko Tymciurak]

I just got done installing 5 new browsers in my new windows environmenet
 all running under Linux.

If you've got a OS/X, Linux, Solaris, Windows, BSD host and would like to
run / test under other environments (like setup a linux that your hosting
company has
to work out your deployment, before going to them and asking for permissions
to files, etc.)

or if you just want to test your app (compiled or otherwise) under other
environments,

then this:   http://2linuces.blogspot.com  might be interesting to you.


- Yarko

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[web2py:26195] Re: task forces

[nathan.ms]

I wonder if we could use satchmo django project for the estore?

On Jul 10, 1:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 I think we need to build two task forces.

 1) to build a CMS

 2) to build a eStore

 the more overlap the better. We need two project leaders and
 volunteers. I also suggest starting by creating google docs to gather
 requirements.

 Lots of people needs these, including me.

 Massimo
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[web2py:26196] Re: task forces

[Yarko Tymciurak]

I think for a CMS, defining what to do, how it would look initially, and
it's structure could take some time to review the best (or most used)
CMS's and what they offer.  The basic structure should not be too hard to
start (Massimo has started several times).

A wiki is probably a core component of this, so considering the components
of a CMS might spawn several projects.

I'd just want to be sure to start with something that will work, will show
how to work in sprint teams, and will produce results rather quickly.  Then
more ambitious projects will have a way to gain traction.

On Fri, Jul 10, 2009 at 3:56 PM, eric cs eeri...@gmail.com wrote:


 We have to beat them...hehehe
 Rails for Spree and Magento for Php/Zend.
 At least Magento for inspiration.


 On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
  Those are bigger, more ambitious projects.
 
  We could start with something shorter, just to work out the task force
  processes
 
  Perhaps a web2py resources site, an update to the appliances app could be
  the first part of that (and an update to it).
  This will give us relatively little to do, and we can work out what will
  work:
 
  I would like to see regular meetings (IRC), and _real_ distance,
 on-line
  code sprints... so that a 2 hour session will find everyone coding a
 piece,
  and a leader merging and running it live for all to review, update, etc.
  (leader to push up to a launchpad, or mercurial).
 
  One of the process things to work out:  stay launchpad, or move
  code.google.com / mercurial.
 
  The latter would give us (if they've worked it out) a code review site,
  which would be a great way for task force to work asynchronously (e.g. in
  between code-sprint meetings).
 
  Code sprints would be useful - if the balance on a team was 3 / 2  or so
 of
  experienced python-web2py-ers, vs people wanting to learn, stretch it
 would
  be a great way to regularly have a place to join in --- real community
  stuff.
 
  How does this sound?   A simpler job to work out the basics of the
 working
  process, find what will work for starters.
 
  - Yarko
 
 
 
  On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:
 
   I am in...but no knowledge, just wanna help and learn on the process
   if that is possible, count with me.
 
   On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
I think we need to build two task forces.
 
1) to build a CMS
 
2) to build a eStore
 
the more overlap the better. We need two project leaders and
volunteers. I also suggest starting by creating google docs to gather
requirements.
 
Lots of people needs these, including me.
 
Massimo- Hide quoted text -
 
  - Show quoted text -
 


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[web2py:26198] Re: task forces

[mdipierro]

magneto is nice.

On Jul 10, 3:56 pm, eric cs eeri...@gmail.com wrote:
 We have to beat them...hehehe
 Rails for Spree and Magento for Php/Zend.
 At least Magento for inspiration.

 On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:

  Those are bigger, more ambitious projects.

  We could start with something shorter, just to work out the task force
  processes

  Perhaps a web2py resources site, an update to the appliances app could be
  the first part of that (and an update to it).
  This will give us relatively little to do, and we can work out what will
  work:

  I would like to see regular meetings (IRC), and _real_ distance, on-line
  code sprints... so that a 2 hour session will find everyone coding a piece,
  and a leader merging and running it live for all to review, update, etc.
  (leader to push up to a launchpad, or mercurial).

  One of the process things to work out:  stay launchpad, or move
  code.google.com / mercurial.

  The latter would give us (if they've worked it out) a code review site,
  which would be a great way for task force to work asynchronously (e.g. in
  between code-sprint meetings).

  Code sprints would be useful - if the balance on a team was 3 / 2  or so of
  experienced python-web2py-ers, vs people wanting to learn, stretch it would
  be a great way to regularly have a place to join in --- real community
  stuff.

  How does this sound?   A simpler job to work out the basics of the working
  process, find what will work for starters.

  - Yarko

  On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:

   I am in...but no knowledge, just wanna help and learn on the process
   if that is possible, count with me.

   On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
I think we need to build two task forces.

1) to build a CMS

2) to build a eStore

the more overlap the better. We need two project leaders and
volunteers. I also suggest starting by creating google docs to gather
requirements.

Lots of people needs these, including me.

Massimo- Hide quoted text -

  - Show quoted text -
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[web2py:26199] Recursive vs Iterative Algorithm

[eric cs]

They compare Ruby 1.9 with Python, than a Python guy change the
algorithm from being recursive to being iterative and runs way
faster...wow.

Can you guys explain those ways of programming with simple examples
with comments?
I heard is very used on functional programming (Erlang,Scala).
How to iterative program in Python and Web2py?


http://antoniocangiano.com/2007/11/28/holy-shmoly-ruby-19-smokes-python-away/

http://www.mysoftparade.com/blog/ruby-19-doesnt-smoke-python-away/

Thanks.

more:
http://en.wikipedia.org/wiki/Iteration
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[web2py:26200] Re: task forces

[Yarko Tymciurak]

for me this is a meta-activity:  porting as an ending action, starting with
analysis of other's solutions.

Analyze (reverse engineer) / restructure (for web2py) / adjust design / port
is a useful idiom to have down.



On Fri, Jul 10, 2009 at 4:09 PM, nathan.ms nathan...@gmail.com wrote:


 I wonder if we could use satchmo django project for the estore?

 On Jul 10, 1:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  I think we need to build two task forces.
 
  1) to build a CMS
 
  2) to build a eStore
 
  the more overlap the better. We need two project leaders and
  volunteers. I also suggest starting by creating google docs to gather
  requirements.
 
  Lots of people needs these, including me.
 
  Massimo
 


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[web2py:26201] amf3

[mdipierro]

the web2py in trunk now works with AMF3. Use the decorator

@service.amfrpc3('yournamespace')
def yourfunction(): 


def call(): return service()

call it with

http://.../app/default/call/amfrpc3

Let me know if it works or does not work for you. I have not tried it
yet.
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[web2py:26202] Re: task forces

[Yarko Tymciurak]

On Fri, Jul 10, 2009 at 4:14 PM, mdipierro mdipie...@cs.depaul.edu wrote:


 I think it would be a good exercise to start from there. I do know if
 sachmo has this but we it would be nice to a web service layer so that
 users can develop frontends in html (the default) or Flex (via
 standard APIs provided by the system).


...not clear what you meant - start from a wiki?  start from a CMS basic
structure?




 On Jul 10, 4:11 pm, Yarko Tymciurak yark...@gmail.com wrote:
  I think for a CMS, defining what to do, how it would look initially, and
  it's structure could take some time to review the best (or most used)
  CMS's and what they offer.  The basic structure should not be too hard to
  start (Massimo has started several times).
 
  A wiki is probably a core component of this, so considering the
 components
  of a CMS might spawn several projects.
 
  I'd just want to be sure to start with something that will work, will
 show
  how to work in sprint teams, and will produce results rather quickly.
  Then
  more ambitious projects will have a way to gain traction.
 
  On Fri, Jul 10, 2009 at 3:56 PM, eric cs eeri...@gmail.com wrote:
 
   We have to beat them...hehehe
   Rails for Spree and Magento for Php/Zend.
   At least Magento for inspiration.
 
   On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
Those are bigger, more ambitious projects.
 
We could start with something shorter, just to work out the task
 force
processes
 
Perhaps a web2py resources site, an update to the appliances app
 could be
the first part of that (and an update to it).
This will give us relatively little to do, and we can work out what
 will
work:
 
I would like to see regular meetings (IRC), and _real_ distance,
   on-line
code sprints... so that a 2 hour session will find everyone coding a
   piece,
and a leader merging and running it live for all to review, update,
 etc.
(leader to push up to a launchpad, or mercurial).
 
One of the process things to work out:  stay launchpad, or move
code.google.com / mercurial.
 
The latter would give us (if they've worked it out) a code review
 site,
which would be a great way for task force to work asynchronously
 (e.g. in
between code-sprint meetings).
 
Code sprints would be useful - if the balance on a team was 3 / 2  or
 so
   of
experienced python-web2py-ers, vs people wanting to learn, stretch it
   would
be a great way to regularly have a place to join in --- real
 community
stuff.
 
How does this sound?   A simpler job to work out the basics of the
   working
process, find what will work for starters.
 
- Yarko
 
On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:
 
 I am in...but no knowledge, just wanna help and learn on the
 process
 if that is possible, count with me.
 
 On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  I think we need to build two task forces.
 
  1) to build a CMS
 
  2) to build a eStore
 
  the more overlap the better. We need two project leaders and
  volunteers. I also suggest starting by creating google docs to
 gather
  requirements.
 
  Lots of people needs these, including me.
 
  Massimo- Hide quoted text -
 
- Show quoted text -
 


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[web2py:26203] Re: task forces

[eric cs]

Flex and Flash front end kick ass.

On Jul 10, 5:14 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 magneto is nice.

 On Jul 10, 3:56 pm, eric cs eeri...@gmail.com wrote:


 W
  We have to beat them...hehehe
  Rails for Spree and Magento for Php/Zend.
  At least Magento for inspiration.

  On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:

   Those are bigger, more ambitious projects.

   We could start with something shorter, just to work out the task force
   processes

   Perhaps a web2py resources site, an update to the appliances app could be
   the first part of that (and an update to it).
   This will give us relatively little to do, and we can work out what will
   work:

   I would like to see regular meetings (IRC), and _real_ distance, on-line
   code sprints... so that a 2 hour session will find everyone coding a 
   piece,
   and a leader merging and running it live for all to review, update, etc.
   (leader to push up to a launchpad, or mercurial).

   One of the process things to work out:  stay launchpad, or move
   code.google.com / mercurial.

   The latter would give us (if they've worked it out) a code review site,
   which would be a great way for task force to work asynchronously (e.g. in
   between code-sprint meetings).

   Code sprints would be useful - if the balance on a team was 3 / 2  or so 
   of
   experienced python-web2py-ers, vs people wanting to learn, stretch it 
   would
   be a great way to regularly have a place to join in --- real community
   stuff.

   How does this sound?   A simpler job to work out the basics of the working
   process, find what will work for starters.

   - Yarko

   On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:

I am in...but no knowledge, just wanna help and learn on the process
if that is possible, count with me.

On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 I think we need to build two task forces.

 1) to build a CMS

 2) to build a eStore

 the more overlap the better. We need two project leaders and
 volunteers. I also suggest starting by creating google docs to gather
 requirements.

 Lots of people needs these, including me.

 Massimo- Hide quoted text -

   - Show quoted text -- Hide quoted text -

 - Show quoted text -
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[web2py:26204] Re: task forces

[mdipierro]

I meant the store is a special class of a CMS so there should be some
overlap.

On Jul 10, 4:22 pm, Yarko Tymciurak yark...@gmail.com wrote:
 On Fri, Jul 10, 2009 at 4:14 PM, mdipierro mdipie...@cs.depaul.edu wrote:

  I think it would be a good exercise to start from there. I do know if
  sachmo has this but we it would be nice to a web service layer so that
  users can develop frontends in html (the default) or Flex (via
  standard APIs provided by the system).

 ...not clear what you meant - start from a wiki?  start from a CMS basic
 structure?



  On Jul 10, 4:11 pm, Yarko Tymciurak yark...@gmail.com wrote:
   I think for a CMS, defining what to do, how it would look initially, and
   it's structure could take some time to review the best (or most used)
   CMS's and what they offer.  The basic structure should not be too hard to
   start (Massimo has started several times).

   A wiki is probably a core component of this, so considering the
  components
   of a CMS might spawn several projects.

   I'd just want to be sure to start with something that will work, will
  show
   how to work in sprint teams, and will produce results rather quickly.
   Then
   more ambitious projects will have a way to gain traction.

   On Fri, Jul 10, 2009 at 3:56 PM, eric cs eeri...@gmail.com wrote:

We have to beat them...hehehe
Rails for Spree and Magento for Php/Zend.
At least Magento for inspiration.

On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
 Those are bigger, more ambitious projects.

 We could start with something shorter, just to work out the task
  force
 processes

 Perhaps a web2py resources site, an update to the appliances app
  could be
 the first part of that (and an update to it).
 This will give us relatively little to do, and we can work out what
  will
 work:

 I would like to see regular meetings (IRC), and _real_ distance,
on-line
 code sprints... so that a 2 hour session will find everyone coding a
piece,
 and a leader merging and running it live for all to review, update,
  etc.
 (leader to push up to a launchpad, or mercurial).

 One of the process things to work out:  stay launchpad, or move
 code.google.com / mercurial.

 The latter would give us (if they've worked it out) a code review
  site,
 which would be a great way for task force to work asynchronously
  (e.g. in
 between code-sprint meetings).

 Code sprints would be useful - if the balance on a team was 3 / 2  or
  so
of
 experienced python-web2py-ers, vs people wanting to learn, stretch it
would
 be a great way to regularly have a place to join in --- real
  community
 stuff.

 How does this sound?   A simpler job to work out the basics of the
working
 process, find what will work for starters.

 - Yarko

 On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:

  I am in...but no knowledge, just wanna help and learn on the
  process
  if that is possible, count with me.

  On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
   I think we need to build two task forces.

   1) to build a CMS

   2) to build a eStore

   the more overlap the better. We need two project leaders and
   volunteers. I also suggest starting by creating google docs to
  gather
   requirements.

   Lots of people needs these, including me.

   Massimo- Hide quoted text -

 - Show quoted text -
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[web2py:26205] Re: Recursive vs Iterative Algorithm

[Yarko Tymciurak]

ugh!  don't go down the rabbit hole!

On Fri, Jul 10, 2009 at 4:19 PM, eric cs eeri...@gmail.com wrote:


 They compare Ruby 1.9 with Python, than a Python guy change the
 algorithm from being recursive to being iterative and runs way
 faster...wow.

 Can you guys explain those ways of programming with simple examples
 with comments?
 I heard is very used on functional programming (Erlang,Scala).
 How to iterative program in Python and Web2py?



 http://antoniocangiano.com/2007/11/28/holy-shmoly-ruby-19-smokes-python-away/

 http://www.mysoftparade.com/blog/ruby-19-doesnt-smoke-python-away/

 Thanks.

 more:
 http://en.wikipedia.org/wiki/Iteration
 


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[web2py:26206] Re: task forces

[Yarko Tymciurak]

I've just _just_ started running the flex for Linux to see if I can make it
thru Eckel's First Steps in Flex book, if the Linux alpha is up to the
task...


On Fri, Jul 10, 2009 at 4:22 PM, eric cs eeri...@gmail.com wrote:


 Flex and Flash front end kick ass.

 On Jul 10, 5:14 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  magneto is nice.
 
  On Jul 10, 3:56 pm, eric cs eeri...@gmail.com wrote:
 
 
  W
   We have to beat them...hehehe
   Rails for Spree and Magento for Php/Zend.
   At least Magento for inspiration.
 
   On Jul 10, 4:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
 
Those are bigger, more ambitious projects.
 
We could start with something shorter, just to work out the task
 force
processes
 
Perhaps a web2py resources site, an update to the appliances app
 could be
the first part of that (and an update to it).
This will give us relatively little to do, and we can work out what
 will
work:
 
I would like to see regular meetings (IRC), and _real_ distance,
 on-line
code sprints... so that a 2 hour session will find everyone coding a
 piece,
and a leader merging and running it live for all to review, update,
 etc.
(leader to push up to a launchpad, or mercurial).
 
One of the process things to work out:  stay launchpad, or move
code.google.com / mercurial.
 
The latter would give us (if they've worked it out) a code review
 site,
which would be a great way for task force to work asynchronously
 (e.g. in
between code-sprint meetings).
 
Code sprints would be useful - if the balance on a team was 3 / 2  or
 so of
experienced python-web2py-ers, vs people wanting to learn, stretch it
 would
be a great way to regularly have a place to join in --- real
 community
stuff.
 
How does this sound?   A simpler job to work out the basics of the
 working
process, find what will work for starters.
 
- Yarko
 
On Fri, Jul 10, 2009 at 3:37 PM, eric cs eeri...@gmail.com wrote:
 
 I am in...but no knowledge, just wanna help and learn on the
 process
 if that is possible, count with me.
 
 On Jul 10, 4:32 pm, mdipierro mdipie...@cs.depaul.edu wrote:
  I think we need to build two task forces.
 
  1) to build a CMS
 
  2) to build a eStore
 
  the more overlap the better. We need two project leaders and
  volunteers. I also suggest starting by creating google docs to
 gather
  requirements.
 
  Lots of people needs these, including me.
 
  Massimo- Hide quoted text -
 
- Show quoted text -- Hide quoted text -
 
  - Show quoted text -
 


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[web2py:26207] Re: sending HTML emails

[kralin]

I've also tried to use MIME to encode both the html, and an
alternative text/html message, however all the encoding goes after
the double newline
and is not interpreted as an header.

so  Yarko are you saying that by doing  send(message='hello message')
instead of send(to=['m...@me.com'], message='hello message')
it should worrk by including the correct headers in the message?


On 10 Lug, 22:15, mdipierro mdipie...@cs.depaul.edu wrote:
 While this can be and something like this can be added it is my
 understanding that you do not need to change the header to send html
 emails. You need to use the MIME encoding and that should be
 transparent to what mail.send does now. If I am wrong please provide
 an example of how to change the headers to send a MIME encoded
 message.

 On Jul 10, 1:31 pm, kralin andrea.pierle...@gmail.com wrote:

  I spent the whole afternoon trying to send an HTML formatted email
  with web2py.
  while I cannote use smtplib directly, cause it seems not to work, and
  I think this should be normal in the framework.
  however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
  it is not possible to alter the content-type, or any other header for
  the email using the gluon.tools.Mail class.
  this happens because anu message that is passed to the mail=Mail()
  object is attached to this string before beeing sent:

  msg = '''From: %s\r
  To: %s\r
  Subject: %s\r
  \r
  %s'''\

  and the double newlines close the headers.

  so it would be very useful to also set at least something link this:

      def send(
          self,
          to,
          subject='None',
          message='None',
          headers='\r\n'
          ):

                  msg = '''From: %s\r
  To: %s\r
  Subject: %s\r
  \r
  %s'''\
                       % (self.settings.sender, ', '.join(to),
  subject,headers,
                          message)

  so that it will be possible to pass directly some header strings or
  pass an empty string as headers, and put them in the message.
  this way they can be correctly recognized.

  hope this helps
  cheers
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[web2py:26208] Re: Check out your web2py app in multiple environments

[Yarko]

ugh - can't even spell my own blog address right:

http://2linices.blogspot.com/

On Jul 10, 4:05 pm, Yarko Tymciurak yark...@gmail.com wrote:
 I just got done installing 5 new browsers in my new windows environmenet
  all running under Linux.

 If you've got a OS/X, Linux, Solaris, Windows, BSD host and would like to
 run / test under other environments (like setup a linux that your hosting
 company has
 to work out your deployment, before going to them and asking for permissions
 to files, etc.)

 or if you just want to test your app (compiled or otherwise) under other
 environments,

 then this:  http://2linuces.blogspot.com might be interesting to you.

 - Yarko
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[web2py:26209] Re: Recursive vs Iterative Algorithm

[eric cs]

Yarko, I hope you are not talking about Python vs Ruby, I don't wanna
know that
just the Recursive vs Iterative Algorithm tecnics to speed you code
up!!



On Jul 10, 5:27 pm, Yarko Tymciurak yark...@gmail.com wrote:
 ugh!  don't go down the rabbit hole!



 On Fri, Jul 10, 2009 at 4:19 PM, eric cs eeri...@gmail.com wrote:

  They compare Ruby 1.9 with Python, than a Python guy change the
  algorithm from being recursive to being iterative and runs way
  faster...wow.

  Can you guys explain those ways of programming with simple examples
  with comments?
  I heard is very used on functional programming (Erlang,Scala).
  How to iterative program in Python and Web2py?

 http://antoniocangiano.com/2007/11/28/holy-shmoly-ruby-19-smokes-pyth...

 http://www.mysoftparade.com/blog/ruby-19-doesnt-smoke-python-away/

  Thanks.

  more:
 http://en.wikipedia.org/wiki/Iteration- Hide quoted text -

 - Show quoted text -
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[web2py:26210] Re: sending HTML emails

[mdipierro]

Here is the problem. The current implementation of Mail is designed to
be cross platform, i.e. work on GAE. It has the same API as GAE.
Unless we figure out how to send MIME email messages on GAE, if you
want to send MIME you should not use Mail native SMTP.

On Jul 10, 4:31 pm, kralin andrea.pierle...@gmail.com wrote:
 I've also tried to use MIME to encode both the html, and an
 alternative text/html message, however all the encoding goes after
 the double newline
 and is not interpreted as an header.

 so  Yarko are you saying that by doing  send(message='hello message')
 instead of send(to=['@me.com'], message='hello message')
 it should worrk by including the correct headers in the message?

 On 10 Lug, 22:15, mdipierro mdipie...@cs.depaul.edu wrote:

  While this can be and something like this can be added it is my
  understanding that you do not need to change the header to send html
  emails. You need to use the MIME encoding and that should be
  transparent to what mail.send does now. If I am wrong please provide
  an example of how to change the headers to send a MIME encoded
  message.

  On Jul 10, 1:31 pm, kralin andrea.pierle...@gmail.com wrote:

   I spent the whole afternoon trying to send an HTML formatted email
   with web2py.
   while I cannote use smtplib directly, cause it seems not to work, and
   I think this should be normal in the framework.
   however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
   it is not possible to alter the content-type, or any other header for
   the email using the gluon.tools.Mail class.
   this happens because anu message that is passed to the mail=Mail()
   object is attached to this string before beeing sent:

   msg = '''From: %s\r
   To: %s\r
   Subject: %s\r
   \r
   %s'''\

   and the double newlines close the headers.

   so it would be very useful to also set at least something link this:

   def send(
   self,
   to,
   subject='None',
   message='None',
   headers='\r\n'
   ):

   msg = '''From: %s\r
   To: %s\r
   Subject: %s\r
   \r
   %s'''\
% (self.settings.sender, ', '.join(to),
   subject,headers,
   message)

   so that it will be possible to pass directly some header strings or
   pass an empty string as headers, and put them in the message.
   this way they can be correctly recognized.

   hope this helps
   cheers
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[web2py:26211] Re: Multithreaded and Multicore Programming/Solutions

[eric cs]

Does anyone know why(technical reason), they say Php scale better and
it is faster.
What does it use to scale better for web apps.


On Jul 10, 5:04 pm, mdipierro mdipie...@cs.depaul.edu wrote:
 There is no real problem with python and multi threading (web2py
 includes a multithreaded server) except for one issue with the Glbal
 Interpreter Lock (i.e. Python multi threaded apps get slower, not
 faster the most cores you have unless you lock python on a core, for
 example by using a virtual machine). This is not a practical concern
 with typical web hosting service where you get assigned one VM. It is
 still faster than rails as long as I can tell.

 The issues you raise are relavent for high performance computing not
 for web development.

 web2py runs with Jython out of the box and it does not have the GIL
 problem but Jython is very slow. Perhaps things will change in the
 future. I know Jruby is faster than CRuby.

 Massimo

 On Jul 10, 3:54 pm, eric cs eeri...@gmail.com wrote:



  Guys I am not expert just thinking about the Twiiter/Rails problem and
  Scala solution and I was wondering that with Python.
  I heard the best option to use Web2py is 2.5 and this version doesn't
  support same features that take care kind of the Multithreaded and
  Multicore problems on Python 2.6 and 3.0.
  One of the solutions is parallel program which can run on multiple
  cores in Python, does Django does has a better approach to that,
  because several apps?
  What about those approaches, can someone explain them better,newbie
  way:

  1-Write a multithreaded program using the threading module and run it
  in the IronPython or Jython runtime.
  2-Use the processing module, (now included in Python 2.6), to run your
  code in multiple processes at once.
  3-Use the subprocess module to run multiple python interpreters and
  communicate between them.
  4-Use Twisted and Ampoule. This has the advantage of not just running
  your code across different processes, but (if you don't share access
  to things like files) potentially across different computers as well.

  I was wondering how are the options to take care of those problems
  what are the future?
  Looks like Python has way better options that Ruby for now.

  Thanks.- Hide quoted text -

 - Show quoted text -
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[web2py:26212] Re: sending HTML emails

[kralin]

ok, so smtplib should work instead of Mail?

On 10 Lug, 23:39, mdipierro mdipie...@cs.depaul.edu wrote:
 Here is the problem. The current implementation of Mail is designed to
 be cross platform, i.e. work on GAE. It has the same API as GAE.
 Unless we figure out how to send MIME email messages on GAE, if you
 want to send MIME you should not use Mail native SMTP.

 On Jul 10, 4:31 pm, kralin andrea.pierle...@gmail.com wrote:

  I've also tried to use MIME to encode both the html, and an
  alternative text/html message, however all the encoding goes after
  the double newline
  and is not interpreted as an header.

  so  Yarko are you saying that by doing  send(message='hello message')
  instead of send(to=['@me.com'], message='hello message')
  it should worrk by including the correct headers in the message?

  On 10 Lug, 22:15, mdipierro mdipie...@cs.depaul.edu wrote:

   While this can be and something like this can be added it is my
   understanding that you do not need to change the header to send html
   emails. You need to use the MIME encoding and that should be
   transparent to what mail.send does now. If I am wrong please provide
   an example of how to change the headers to send a MIME encoded
   message.

   On Jul 10, 1:31 pm, kralin andrea.pierle...@gmail.com wrote:

I spent the whole afternoon trying to send an HTML formatted email
with web2py.
while I cannote use smtplib directly, cause it seems not to work, and
I think this should be normal in the framework.
however in the current release (Version 1.65.0 (2009-07-01 12:16:25))
it is not possible to alter the content-type, or any other header for
the email using the gluon.tools.Mail class.
this happens because anu message that is passed to the mail=Mail()
object is attached to this string before beeing sent:

msg = '''From: %s\r
To: %s\r
Subject: %s\r
\r
%s'''\

and the double newlines close the headers.

so it would be very useful to also set at least something link this:

    def send(
        self,
        to,
        subject='None',
        message='None',
        headers='\r\n'
        ):

                msg = '''From: %s\r
To: %s\r
Subject: %s\r
\r
%s'''\
                     % (self.settings.sender, ', '.join(to),
subject,headers,
                        message)

so that it will be possible to pass directly some header strings or
pass an empty string as headers, and put them in the message.
this way they can be correctly recognized.

hope this helps
cheers
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[web2py:26213] Re: Recursive vs Iterative Algorithm

[Yarko Tymciurak]

On Fri, Jul 10, 2009 at 4:38 PM, eric cs eeri...@gmail.com wrote:


 Yarko, I hope you are not talking about Python vs Ruby, I don't wanna
 know that
 just the Recursive vs Iterative Algorithm tecnics to speed you code
 up!!


:-)  No, I meant the rabbit hole of getting caught up in performance
numbers! ;-)





 On Jul 10, 5:27 pm, Yarko Tymciurak yark...@gmail.com wrote:
  ugh!  don't go down the rabbit hole!
 
 
 
  On Fri, Jul 10, 2009 at 4:19 PM, eric cs eeri...@gmail.com wrote:
 
   They compare Ruby 1.9 with Python, than a Python guy change the
   algorithm from being recursive to being iterative and runs way
   faster...wow.
 
   Can you guys explain those ways of programming with simple examples
   with comments?
   I heard is very used on functional programming (Erlang,Scala).
   How to iterative program in Python and Web2py?
 
  http://antoniocangiano.com/2007/11/28/holy-shmoly-ruby-19-smokes-pyth.
 ..
 
  http://www.mysoftparade.com/blog/ruby-19-doesnt-smoke-python-away/
 
   Thanks.
 
   more:
  http://en.wikipedia.org/wiki/Iteration- Hide quoted text -
 
  - Show quoted text -
 


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[web2py:26214] Re: Recursive vs Iterative Algorithm

[eric cs]

ahaa, yes I on the deep end, but I like to know the diferent way of
thinking/programming.
and if it makes fast better yet...heheh

On Jul 10, 5:49 pm, Yarko Tymciurak yark...@gmail.com wrote:
 On Fri, Jul 10, 2009 at 4:38 PM, eric cs eeri...@gmail.com wrote:

  Yarko, I hope you are not talking about Python vs Ruby, I don't wanna
  know that
  just the Recursive vs Iterative Algorithm tecnics to speed you code
  up!!

 :-)  No, I meant the rabbit hole of getting caught up in performance
 numbers! ;-)





  On Jul 10, 5:27 pm, Yarko Tymciurak yark...@gmail.com wrote:
   ugh!  don't go down the rabbit hole!

   On Fri, Jul 10, 2009 at 4:19 PM, eric cs eeri...@gmail.com wrote:

They compare Ruby 1.9 with Python, than a Python guy change the
algorithm from being recursive to being iterative and runs way
faster...wow.

Can you guys explain those ways of programming with simple examples
with comments?
I heard is very used on functional programming (Erlang,Scala).
How to iterative program in Python and Web2py?

   http://antoniocangiano.com/2007/11/28/holy-shmoly-ruby-19-smokes-pyth.
  ..

   http://www.mysoftparade.com/blog/ruby-19-doesnt-smoke-python-away/

Thanks.

more:
   http://en.wikipedia.org/wiki/Iteration-Hide quoted text -

   - Show quoted text -- Hide quoted text -

 - Show quoted text -
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[web2py:26215] Re: javascript function call from controller

[JohnMc]

Julius,

Javascript has a built in restrictions at two levels. 1) Do not permit
client side file access. 2) Accept only data from the originating DOM
source. Both are designed for security protections.

Using the ajax call as Massimo defined it permits the state in the
current form to change so that the appropriate dialog can be displayed
and still conforms to the javascript security model.

On Jul 10, 12:34 pm, Julius Minka j...@minka.sk wrote:
 Massimo,
 I can see following:

 1. in Jquery documentation:
 html(val)
 Set the html contents of every matched element. This property is not
 available on XML documents (although it will work for XHTML documents).

 2. in current svn trunk in web2py_ajax.html something like this:
 function ajax(u,s,t) {
    var query=;
    for(i=0; is.length; i++) {
       if(i0) query=query+;

 query=query+encodeURIComponent(s[i])+=+encodeURIComponent(document.getElementById(s[i]).value);
    }
    jQuery.ajax({type: POST, url: u, data: query, success:
 function(msg) { if(t==':eval') eval(msg); else
 document.getElementById(t).innerHTML=msg; } });

 }

 BUT:
 I still do not understand, how it should help me to call javascript
 function from controller.
 Can you please explain it more?
 Julius

 mdipierro  wrote / napísal(a):

  With the latest trunk you can do

  intput name=value id=value /
  button onclick=ajax('callback',['value'],':eval')click me/button
  div id=target/div

  def callback():
       value=request.vars.value
       return jQuery('#target').html(%s) % repr(str(value))

  when you click the button it sends the value of value to the callback
  function. The function returns a jQuery string and the clients runs
  it. The trick here is ajax(...,':eval') which is defined by web2py.

  On Jul 10, 8:56 am, Julius Minka j...@minka.sk wrote:
  Hi all,

  I have a javascript function in html file which is usually called from
  onclick event in the same file. It works fine.
  However I would like to call this javascript function from a controller.

  More precise description:
  after clicking an element in the page, the flow goes to controller.
  There I decide which dialog to display (I have it working to this
  point), but it is defined again in html file as jquery dialog opening
  with .dialog(open);
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[web2py:26216] Re: amf3

[Jason Brower]

What is this for?


On Fri, 2009-07-10 at 14:21 -0700, mdipierro wrote:
 amfrpc3


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