Re: django as a platform for a commercial SaaS project?

[John DeRosa]

Lee Hinde wrote:
> 
> 
> On Mar 24, 8:03 pm, John DeRosa <[EMAIL PROTECTED]> wrote:
>> walterbyrd wrote:
>>> SaaS = Software as a service, just in case that was not clear.
>> What's the difference between SaaS and an ASP?  I don't quite get the
>> distinction between them.
> 
> The ASP provides the SaaS.

Yes and no.  The term "ASP" existed before "SaaS" came on the scene.  I 
think ASPs were selling something to their customers before SaaS was 
"invented."

The point of my original post was that the meaning of ASP and SaaS, and 
whether there's any real difference between them, depends on who's doing 
the talking.


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Re: manage.py startapp suggestions

[[EMAIL PROTECTED]]

Tom,
Thanks for going forward with this, there are alot of people who
want something like this.


On Mar 23, 8:17 am, Tom Smith <[EMAIL PROTECTED]> wrote:
> > Unfortunatly given your example, 90% of what you want (urls.py with
> > static file handling, a media directory, building the actual model)
> > are things I expressly do NOT want the wizard to do for ME. (I have my
> > own genapp.py tool I use for creating new apps.)
>
> Interesting... I'd like to know why you don't want those things and
> see your own genapp script...
It will be checked into the PyCon-Tech code base in a month or two
(other projects are consuming my time these days).
http://us.pycon.org/TX2007/PyConTech

I optionally want models.py, views.py, forms.py, urls.py,
decorators.py, media/{js, img, css}/, templates//,
templatetags/.py with some standard header information.
There are very, very few common threads between my models, and I would
prefer a graphical interface for the models, as a second stage in the
app building.
Of the 7 core apps for the conference software, no two share a common
model structure:
https://svn.python.org/conference/django/trunk/pycon/

I was being a little disingenuous when I said I didn't want most of
it. I don't want a text based model builder.
The tool I have is a small wxpython app. A friend and I were thinking
of turning it into a django app with an ajax model builder. I'm an old
OMT hack and it appeals to me, but the recursive nature of it gives me
a migraine.

On the serving of static media:
I have a custom django app (called appmedia) which deals with serving
up static content in the 'media' directory of any app if its the dev
server, otherwise it is up to apache or httplight to serve up media in
production. (and adds {% app_media_root "myapp" %} ) so there is no
need for me to serve up media local to the apps urls.py
This goes against one of the django style rules, but I feel its
cleaner.

> I've started re-working mine based
> purely on my own crazy preferences and habits. For example, if I add
> an attribute to a class called "name", it assumes it's a CharField
> and  it also adds a SlugField called "slug"... I didn't know they
> existed till today. If I add an attribute called "url"... you can
> guess where that one is going..
I like the Idea of it, but I am concerned you will end up with a meta-
model language once you get everything done. As long as you don't go
too crazy with it, it should be fine.

> I'd love a call like this...
>
>  >>> python startapp.py my_app_name -flavour=(tom | doug | malcolm |
> james )
My first implementation used something like the flavor you propose (I
made the mistake of calling it -type).
I had 4 spec'd out, and discovered that NONE of my 25 some odd apps
actually conformed to any of the 4 specs.
I think this was due to my purist mind conflicting with the reality of
the apps I wrote.
Someone other than me will hopefully be able to find some reoccurring
patterns that actually reoccur.

-Doug



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A Quick Introduction To Islam

[one_not_three]

A Quick Introduction To Islam

The word "Islam" is an Arabic word which means "submission to the will
of God". This word comes from the same root as the Arabic word
"salam", which means "peace". As such, the religion of Islam teaches
that in order to achieve true peace of mind and surety of heart, one
must submit to God and live according to His Divinely revealed Law.
The most important truth that God revealed to mankind is that there is
nothing divine or worthy of being worshipped except for Almighty God,
thus all human beings should submit to Him.

http://discover.islamway.com


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Re: django as a platform for a commercial SaaS project?

[Lee Hinde]

On Mar 24, 8:03 pm, John DeRosa <[EMAIL PROTECTED]> wrote:
> walterbyrd wrote:
> > SaaS = Software as a service, just in case that was not clear.
>
> What's the difference between SaaS and an ASP?  I don't quite get the
> distinction between them.

The ASP provides the SaaS.


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Re: django as a platform for a commercial SaaS project?

[John DeRosa]

walterbyrd wrote:
> SaaS = Software as a service, just in case that was not clear.

What's the difference between SaaS and an ASP?  I don't quite get the 
distinction between them.

John


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Re: Django and Routing SUBDOMAIN STYLE URL

[johnny]

How do you test the subdomin url style in Django development server?

Developer server is at:
http://127.0.0.1:8000/

Thank you.



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Re: Adding a field to a model

[James Bennett]

On 3/24/07, Malcolm Tredinnick <[EMAIL PROTECTED]> wrote:
> (3) At your database prompt ("manage.py shell" and go from there),
> execute "ALTER TABLE ADD COLUMN ... DEFAULT ...", filling in the first
> "..." part with the column definition you noted before. You will also
> need to add a DEFAULT value to the column at the database level so that
> existing entries have a value for that column. If the column can be
> NULL, you won't need the default value -- it will just put NULLs in
> there for all the existing entries.

Alternative, and even better in my experience: write a SQL file which
will run the update inside a transaction, and commit that into the SVN
repo with your app so you have a history of what you've done to the
DB.

-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: Adding a field to a model

[Malcolm Tredinnick]

On Sat, 2007-03-24 at 18:04 -0700, Mark Engelberg wrote:
> I know that, unfortunately, there's no painless way to migrate all the
> data in your database when you add a new optional field to your model.
>  Pity.
> 
> So what is the MOST painless way to do this?

(1) Add the field to your model.

(2) Run "manage.py sql " and note the type of column that is
added to the model's table.

(3) At your database prompt ("manage.py shell" and go from there),
execute "ALTER TABLE ADD COLUMN ... DEFAULT ...", filling in the first
"..." part with the column definition you noted before. You will also
need to add a DEFAULT value to the column at the database level so that
existing entries have a value for that column. If the column can be
NULL, you won't need the default value -- it will just put NULLs in
there for all the existing entries.

(4) Sit back with drink of choice and realise just how painless the
whole process was.

Regards,
Malcolm



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Re: Adding a field to a model

[John M]

I think the new .96 version has a export / import data function now.

On Mar 24, 6:04 pm, "Mark Engelberg" <[EMAIL PROTECTED]> wrote:
> I know that, unfortunately, there's no painless way to migrate all the
> data in your database when you add a new optional field to your model.
>  Pity.
>
> So what is the MOST painless way to do this?
>
> --Mark


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Adding a field to a model

[Mark Engelberg]

I know that, unfortunately, there's no painless way to migrate all the
data in your database when you add a new optional field to your model.
 Pity.

So what is the MOST painless way to do this?

--Mark

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Re: multiple field primary key and foreign keys as primary keys

[Russell Keith-Magee]

On 3/25/07, checco <[EMAIL PROTECTED]> wrote:
>
> and I want to create a primary key that is composed of field1 and
> field 2 in table 3, is this possible in django? Can I do something
> like...
>
> field1 = ForeignKey('table1', primarykey=True)
> field2= ForeignKey('table2', primarykey=True)

Hi Francesco,

You can make any individual field the primary key using
`primary_key=True` - so, for example:

class MyModel(models.Model):
key = ForeignKey('table1', primary_key=True)
data = ...

would make a foreign key on Table1 the primary key on MyModel.
However, if you give multiple fields the primary_key attribute, only
the first will be used to designate a primary key. Django does not
currently support multiple field primary keys.

Yours,
Russ Magee %-)

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Re: How to handle a preview page

[Malcolm Tredinnick]

On Sat, 2007-03-24 at 08:47 -0400, Todd O'Bryan wrote:
[...]
> Let me ask a silly question before I go off and do something radical,
> just to make sure I won't hit a brick wall later.
> 
> I'm trying to model every conceivable kind of question in a way that
> won't involve changing the database later. To do this, my Question model
> has some meta-information and has a OneToMany mapping to a DataBit
> model. A DataBit has fields for type and one piece each of textual and
> numeric data. If I want a true/false question, it has two DataBit
> objects: a bit containing the statement and a bit indicating whether
> it's true or false. If I want a fill-in-the-blank question, it has one
> DataBit instance for the statement and one for each answer that belongs
> in the blanks. For a multiple-choice question, there are several bits:
> the question, each possible answer, and a bit saying which answer is
> correct.

Okay, I understand what you're trying to achieve here. It looks like it
might be a job for Generic relations, since it sounds like you are
wanting to relate one model (Question) to an arbitrary other type of
model (the answers), differentiating by some "type" string.

If you haven't seen them yet, have a look at
http://www.djangoproject.com/documentation/models/generic_relations/ . I
don't know if this will make your life easier or not, but it sounds like
an alternative (or equivalent) to what you are doing.

> Obviously, trying to represent these things directly from the database
> is a bit of a pain, so I have non-model classes that translate from the
> representation in the database to a more natural representation and vice
> versa. These classes also create the forms (as in django.newforms) that
> I display.
> 
> Could I pickle one of these non-model objects and use the pickled value
> in a hidden field to store everything all at once and then get it back
> really easily? I've never used pickle, so I'm a little apprehensive that
> there are gotchas I don't know about, but, if it works the way it's
> advertised, it seems an easy way to dump something into the preview and
> then reconstruct it on the way out. Are there any gotchas I should be
> aware of before I start?

It's a security hole if you just do it the way you described. As you no
doubt realise, just because the field is hidden, doesn't mean it's value
cannot be changed. So you are going to end up unpickling random data
that somebody you don't know or trust has just sent you and that could
have unintended side effects. One way to avoid this is to sign the
pickled string (e.g. hash the combination of the string with a secret
mixed in).

Regards,
Malcolm


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Re: Newbie problem with view/model interaction

[James Bennett]

On 3/24/07, Ivan Sagalaev <[EMAIL PROTECTED]> wrote:
> Not related to your question, but this is called 'template' in Django.
> 'View' means a different thing (a controller).

Well, Django doesn't really have anything that strictly matches the
"controller" aspect; even Martin Fowler in his writeup of the MVC
pattern admits that controller/view separation isn't always useful :)

> I'm sure someone will suggest something less scary for a beginner but I
> can now only come up with such a custom template tag:

This is pretty much what I'd do (and what I've done in several
situations); given that this is a common situation it might be useful
for us to bundle an easy way to build if-style tags, much like the
simple_tag and inclusion_tag decorators.


-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: Django and Routing SUBDOMAIN STYLE URL

[Aidas Bendoraitis]

My solution to this is a custom middleware that rewrites the path
according the subdomain, before url parsing and getting views:

This is a short extract:

class URLRewriteMiddleware(object):
"""Middleware that manages urls with subdomains
"""
def process_request(self, request):
"""change path
(x).example.com/(y) -> example.com/subdomains/(x)/(y)
exception: www.example.com
"""
if settings.SUBDOMAINS_SUPPORTED:
site = Site.objects.get_current()
subdomain = request.META['HTTP_HOST'][:-len(site.domain)-1]
if subdomain and subdomain!="www":
path = request.path[len(settings.ROOT_DIR)]
request.path = "%s%s%s/%s" % (settings.ROOT_DIR,
settings.SUBDOMAIN_MNG_DIR, subdomain, path)
return None

My settings variables:
ROOT_DIR - either "/" or "/projectname/" depending on how my project
is accessed - under some domain directly or in some directory of
localhost.
SUBDOMAINS_SUPPORTED - Are subdomains supported on that server? True/False
SUBDOMAIN_MNG_DIR - the (x) directory to which all the query is added

Regards,
Aidas Bendoraitis [aka Archatas]


On 3/24/07, johnny <[EMAIL PROTECTED]> wrote:
>
> How do I route subdomains style url: http://api.mysite.com/ ?
>
> Thank you.
>
>
> >
>

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Re: Announcing Django 0.96!

[mariuss]

On Mar 24, 1:22 pm, "Todd O'Bryan" <[EMAIL PROTECTED]> wrote:
> Django gets installed in your Python version's site-packages
> folder--/usr/lib/python2.x/site-packages is typical for Linux. Probably
> the easiest thing to do is delete the django folder you find there and
> re-install.

Hm, yes, there is such a folder:
/usr/lib/python2.4/site-packages/Django-0.95.1-py2.4.egg

but isn't this recorded in some registry/database/path as well?

Is it safe to just remove the folder? Why do you need a setup script
if it all boils down to a folder?

Just wondering.

Thanks,
Marius

>
> Todd
>
> On Sat, 2007-03-24 at 13:14 -0700, mariuss wrote:
> > On Mar 23, 5:13 pm, "mariuss" <[EMAIL PROTECTED]> wrote:
> > > I downloaded 0.96 and installed it using "python setup.py install"
>
> > > But it is still Django 0.95.1 (previously installed) that shows up.
> > > How can I uninstall the old version?
>
> > Any suggestions? Pointers to some documentation?
>
> > The answer could be trivial, but since I am not familiar with
> > setuptools I can't figure this out. Checked the setuptools site, could
> > not find anything related to uninstall. Probably I am looking for the
> > wrong thing.
>
> > Thanks,
> > Marius


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Django and Routing SUBDOMAIN STYLE URL

[johnny]

How do I route subdomains style url: http://api.mysite.com/ ?

Thank you.


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Re: Announcing Django 0.96!

[Todd O'Bryan]

Django gets installed in your Python version's site-packages
folder--/usr/lib/python2.x/site-packages is typical for Linux. Probably
the easiest thing to do is delete the django folder you find there and
re-install.

Todd

On Sat, 2007-03-24 at 13:14 -0700, mariuss wrote:
> On Mar 23, 5:13 pm, "mariuss" <[EMAIL PROTECTED]> wrote:
> > I downloaded 0.96 and installed it using "python setup.py install"
> >
> > But it is still Django 0.95.1 (previously installed) that shows up.
> > How can I uninstall the old version?
> 
> Any suggestions? Pointers to some documentation?
> 
> The answer could be trivial, but since I am not familiar with
> setuptools I can't figure this out. Checked the setuptools site, could
> not find anything related to uninstall. Probably I am looking for the
> wrong thing.
> 
> Thanks,
> Marius



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Re: Announcing Django 0.96!

[mariuss]

On Mar 23, 5:13 pm, "mariuss" <[EMAIL PROTECTED]> wrote:
> I downloaded 0.96 and installed it using "python setup.py install"
>
> But it is still Django 0.95.1 (previously installed) that shows up.
> How can I uninstall the old version?

Any suggestions? Pointers to some documentation?

The answer could be trivial, but since I am not familiar with
setuptools I can't figure this out. Checked the setuptools site, could
not find anything related to uninstall. Probably I am looking for the
wrong thing.

Thanks,
Marius


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Re: Django-0.96 hosting available at WebFaction

[queezy]

WOW!  Cool, Remi - I'm already a member (a12007 is my ID) and I will 
activate Django later today!!

Cheers!

-Warren


- Original Message - 
From: "Remi" <[EMAIL PROTECTED]>
To: "Django users" 
Sent: Saturday, March 24, 2007 10:47 AM
Subject: ANN: Django-0.96 hosting available at WebFaction


>
> Hi everyone,
>
> I'm happy to announce that WebFaction have added Django-0.96 to
> their one-click installer.
> We've also upgraded MySQLdb to version 1.2.2 on all of our servers
> because the previous version we had wasn't compatible with the
> new Django version.
>
> Remi
>
> http://www.webfaction.com - Hosting for an agile web.
>
>
> > 


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multiple field primary key and foreign keys as primary keys

[checco]

Hi,

I'm designing a database where I have a situation similar to this...

table1
field1(primary key), field2 .

table 2
field1(primary key), field2, 

table 3
field1 (foreign key to field1 of table1), field2 (foreign key to
field1 of table 2)

and I want to create a primary key that is composed of field1 and
field 2 in table 3, is this possible in django? Can I do something
like...

field1 = ForeignKey('table1', primarykey=True)
field2= ForeignKey('table2', primarykey=True)

Thanks,
Francesco


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ANN: Django-0.96 hosting available at WebFaction

[Remi]

Hi everyone,

I'm happy to announce that WebFaction have added Django-0.96 to
their one-click installer.
We've also upgraded MySQLdb to version 1.2.2 on all of our servers
because the previous version we had wasn't compatible with the
new Django version.

Remi

http://www.webfaction.com - Hosting for an agile web.


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Re: syncdb & postgreSQL

[James Bennett]

On 3/24/07, jewe <[EMAIL PROTECTED]> wrote:
> The constraints was now creates with a new nameconstruct.
> i.E.: team_id_refs_team_id_6e4cb777
>
> The referenced tabel was now named without the tablename. I assume
> that's a hash-value.(?)

Yes, the way Django names database constraints changed between the
0.95 and 0.96 releases; there's an item in the release notes for 0.96
about this, including suggested workarounds.

-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: Newbie problem with view/model interaction

[Todd O'Bryan]

What is it you want to do with the ones they've voted on vs. haven't? If
you're going to hide the ones they've already voted on, just write a
query in the view method that only returns those and pass that to the
context. (Note: the view method, not the template. See Ivan's response.)

If they have to be in alphabetical order by title and you're going to
show all of them, add something to each one that indicates whether
they've been voted on. Your list could morph into a list of tuples where
the first item is a paper and the second item is a boolean indicating
whether the current user has voted.

Something like:

def display_votes(request):
all_papers = Paper.objects.all()
tuple_list = [(p, p.has_voted(request.user)) for p in all_papers]
...

Then in the template:

{% for paper_voted in tuple_list %}
{% if paper_voted.1 %}
   stuff if they voted, paper is accessible as paper_voted.0
{% else %}
   stuff if they haven't
{% endif %}

HTH,
Todd

On Sat, 2007-03-24 at 07:55 -0700, Ross Burton wrote:

> My initial implementation was split across the template and the
> model.  In my model:
> 
> class Paper (models.Model):
> ...
> def has_voted(paper, user):
> return paper.vote_set.filter(user__exact = user).count() != 0
> 
> then in the view:
> 
> {% for paper in object_list|dictsort:"title" %}
>   {% if paper.has_voted( TODO ) %}
> 
> 
> I then discovered that you can't pass arguments to methods in
> templates, so I can't ask the model if the current user has voted.
> 
> Can anyone give any hints on how I can fix this?
> 
> Thanks,
> Ross



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Re: name 'current_datetime' is not defined

[James Bennett]

On 3/24/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Like the commentor before, I could not get this example to run.
> However, applying what he suggested, ie. specifying current_datetime
> as a string instead, it runs now.

Using a function directly, instead of a string, is included in the
Django 0.96 release, and had been in the development version of Django
for some time; the "function object has no attribute 'rindex'" error
comes from using an older version of Django (such as the 0.95 release)
which did not include this feature.

Now that 0.96 is the current release, there shouldn't be any
incompatibilities (assuming that anyone who follows along with the
book is using the 0.96 release or a Subversion checkout of trunk).

-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: Can I write standalone Python app that uses Django auth, DB and models?

[[EMAIL PROTECTED]]

If this is a concern, you may want to take a look at Pyro.  If this is
intended to be an application that runs over a network, you can put
the django code on the server and execute it as a remote object.  This
abstracts the code and prevents access to the full database API.

On Mar 22, 11:14 pm, "Matthew Flanagan" <[EMAIL PROTECTED]>
wrote:
> On 3/23/07, Kenneth Gonsalves <[EMAIL PROTECTED]> wrote:
>
>
>
> > On 23-Mar-07, at 6:22 AM, Mike Stoddart wrote:
>
> > > For example, I have a web app that defines a number of models. People
> > > use the web interface but I also want to write some Python utils that
> > > access the same database and data using the same models as standalone
> > > applications.
>
> > as i am very fond of saying - django is nothing but python
>
> Yes, but Django auth is really only for web apps and can be easily
> bypassed in commandline scripts, for example:
>
> $ python
> Python 2.4.4 (#1, Mar 21 2007, 14:34:56) [C] on sunos5
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> from myapp.models import SomeThing
> >>> for obj in SomeThing.objects.all():
> >>>obj.delete()
>
> If the full Django api is available on the system then this kind of
> thing is difficult to prevent.
>
> > --
>
> > regards
> > kg
> >http://lawgon.livejournal.com
> >http://nrcfosshelpline.in/web/
>
> --
> matthewhttp://wadofstuff.blogspot.com


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building a django rpm, probs with adding documentation

[Paul Rauch]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hello,

I'm currently building a rpm of django for suse.

But I can't figure out how to add the documentation, it doesn't get
added, when running "python setup.py build"

mfg Paul Rauch
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.5 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org

iQIVAwUBRgVILRG67lyyQrltAQIPPxAAmQEIUXONzAYWmMjsfvwwwFLexqEgSYvE
pBNrXVdLuYh4GE/iuU9jrL5nxo7RN+/cc8AsQaWK76D0z98BdZjHccoNoqZy1RkA
AJyYkZTMlgW2d715cKTFMIYAVWeKug7BtyeEvx+/rh7fh/OJnCB+G7ZcgUmZDw8H
qIc2x/l6NkrynNlqbAL17Es0CyqiXmXl1p/sGregkjIxC5pJtxK8Ro2uIxVNnXIc
B+lJMoJuySrWq9gp8kEzfM7orrB5No4bYIowUODVJBQGiLpM/1Xbj6/z3BtOvf3B
wXp4hODzkgkmjYRdIp5UN0kIt2wMmy0eDq5tL9NjotVZLE8JbAzMNB1U6Ftp/2U+
mxCiEx6e2yMu+XrWK+H7NXjSDsG7+46GcFu8xdd7j58Ly36cjsmYOaq+WR6DaFf7
l0JotUlzTm9eJQo4TVgEjoZEbTh1Iygn00XDNjsvuqw9LMv/fOZ8WRcvr87Nw2ON
O5+OHtuKYcLvIowFv+0Sk50dAwJIsJXyx1QactwTi4Wt310f8Vz2HHUWK25tPyb6
PY2EqrwGyr6D4GWDQcMuzGPutvnnUypP/yaRUci3u784dds9Z74Z6xEEvoEqW3uS
DupMbWs8jvUGvkqPKYphBbTtj8kII1QJYJkm39HVkfGIdR/ZfblpbqTgg8y4lOpp
PT0cIvXa2mo=
=lsw0
-END PGP SIGNATURE-

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Re: Newbie problem with view/model interaction

[Ivan Sagalaev]

Ross Burton wrote:
> then in the view:
> 
> {% for paper in object_list|dictsort:"title" %}
>   {% if paper.has_voted( TODO ) %}
> 

Not related to your question, but this is called 'template' in Django. 
'View' means a different thing (a controller).

> I then discovered that you can't pass arguments to methods in
> templates, so I can't ask the model if the current user has voted.

I'm sure someone will suggest something less scary for a beginner but I 
can now only come up with such a custom template tag:

 class IfVotedNode(template.Node):
   def __init__(self, paper_expr, node_list):
 self.paper_expr, self.node_list = obj_expr, node_list

   def render(self, context):
 paper = self.paper_expr.resolve(context)
 if paper.has_voted(context['user']):
   return self.node_list.render(context)
 else:
   return ''

 @register.tag
 def ifvoted(parser, token):
   bits = token.contents.split()
   if len(bits) != 2:
 raise template.TemplateSyntaxError, '"%s" takes 1 parameter ' % 
bits[0]
   node_list = parser.parse('end' + bits[0])
   parser.delete_first_token()
   return IfVotedNode(parser.compile_filter(bits[1]),node_list)

It's then used like this:

 {% ifvoted paper %}...{% endifvoted %}

Docs on creating custom template tags are here: 
http://www.djangoproject.com/documentation/templates_python/#writing-custom-template-tags

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django as a platform for a commercial SaaS project?

[walterbyrd]

SaaS = Software as a service, just in case that was not clear.

If I wanted to create commercial quality hosted software, would django
be the best solution? The sort of things I have in mind would be very
database oriented, and involve a lot of forms and reports. I would
like to be able to easily customize the software.

As much as I dislike microsoft, I wonder if I would be more productive
with ASP.NET?


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Newbie problem with view/model interaction

[Ross Burton]

Hi,

(I'm a bit of a newbie to Django so excuse any foolish mistakes)

I'm writing a basic paper review system for a conference (Paper is the
primary object, with Note and Vote objects having a foreign key to the
paper), and currently have it somewhat working.  Now my task is to
make the list of papers (currently a generic object_list view) show
whether the current user (all users are forced to login) has voted on
each paper.

My initial implementation was split across the template and the
model.  In my model:

class Paper (models.Model):
...
def has_voted(paper, user):
return paper.vote_set.filter(user__exact = user).count() != 0

then in the view:

{% for paper in object_list|dictsort:"title" %}
  {% if paper.has_voted( TODO ) %}


I then discovered that you can't pass arguments to methods in
templates, so I can't ask the model if the current user has voted.

Can anyone give any hints on how I can fix this?

Thanks,
Ross


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Re: syncdb & postgreSQL

[jewe]

1 hour ago, I have installed the svn-version from django (rev.4809)
and now, it works brilliant (for the moment :o)).

The constraints was now creates with a new nameconstruct.
i.E.: team_id_refs_team_id_6e4cb777

The referenced tabel was now named without the tablename. I assume
that's a hash-value.(?)

Anyway, now it works.

thx, for the efforts!!!

Note:
If you try to install django from svn in windows and you have to
create a new *.pth file. Use only small types in the path-statement!!!


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Fwd: Different subdomain for each application (again)

[Tom Smith]

A while ago Doug and Eivind asked about using subdomains for each app.

I'd like to do this, but in the example they had a stab at they were  
using Apache whereas I'm using Lighttpd...


ideally I'd like subdomainone.wherever.com and  
subdomaintwo.wherever.com to pass through without anything AFTER the /.

I tried creating a root urls.py like this...

urlpatterns = patterns('',
(r'^/?$', 'app.views.main'),
(r'^admin/', include('django.contrib.admin.urls')),)

and a kinda main views.py like this...

def main(request):
#handle any calls
from django.conf.urls.defaults import *

server_name = request.META['SERVER_NAME'].split(".")
domain = server_name[0]

if domain == 'subdomainone': urlpatterns = patterns('',  (r'^/?$',  
include('seo.one.urls')),   )
if domain == 'subdomaintwo': urlpatterns = patterns('', (r'^/?$',  
include('seo.two.urls')),   )

. of course I can get the domain out of the SERVER_NAME, but then  
setting urlpatterns doesn't actually DO anything does it?

regards

tom









 

Tom Smith
http://www.theotherblog.com 
yahoo, aim, skype: everythingability
mob: +44 (0) 7720 288 285   
tel: +44 (0) 1904 870 565
fax: +44 (0) 8716 613 413
--- usability, findability, profitability, remarkability  
---



 

Tom Smith
http://www.everythingability.com
yahoo, aim, skype: everythingability
mob: +44 (0) 7720 288 285   
tel: +44 (0) 1904 870 565
fax: +44 (0) 8716 613 413
--- usability, findability, profitability, remarkability  
---



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Re: name 'current_datetime' is not defined

[[EMAIL PROTECTED]]

I had the same problem. And I couldnt solve it by what MIke SPralding
or gordy suggested. But here I found the solution

#

Arvind Jan 22nd, 2007 3 p.m. √

Passing a function as the second argument does not work. In fact,
the example in the book till now does not work, even if used word for
word. There is a problem in the urlconf, as it looks for a string. So,
instead of (r'^now/$', current_datetime) , I need to specify it as
(r'^now/$', "mysite.views.current_datetime")

#

Chai Ang Jan 29th, 2007 6:20 p.m. √

Like the commentor before, I could not get this example to run.
However, applying what he suggested, ie. specifying current_datetime
as a string instead, it runs now.




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Re: How to handle a preview page

[Todd O'Bryan]

On Sat, 2007-03-24 at 08:41 +1100, Malcolm Tredinnick wrote:

> Quite often, preview and edit are combined on the same form, so you see
> the preview version at the top and the editable fields lower down. If
> you do this, your single form (for edit/create) just needs a block at
> the top that contains the optional "static preview" version.

Yeah. I don't mind this much in wikis, but it feels ugly to me in
general, especially if the form is rather long.

> Another way is to layout the form fields as you normally would and then
> use CSS to hide them (feels ugly to me, but technically possible).

That's an idea, but probably not great for text readers. And you're
right--using CSS for what is basically content formatting is just as
bad, IMHO, as using HTML for presentation.

> If you don't want to do either of these and truly want to store the
> information in hidden fields the second time around, then, yes, you are
> going to have to specify all the hidden fields, or provide a way to
> alter the "type" of your original fields between their editable type and
> "hidden". So there will be some repetition, whether you generate them
> programmatically or by hand. That really can't be avoided because you
> *are* repeating the information.

Let me ask a silly question before I go off and do something radical,
just to make sure I won't hit a brick wall later.

I'm trying to model every conceivable kind of question in a way that
won't involve changing the database later. To do this, my Question model
has some meta-information and has a OneToMany mapping to a DataBit
model. A DataBit has fields for type and one piece each of textual and
numeric data. If I want a true/false question, it has two DataBit
objects: a bit containing the statement and a bit indicating whether
it's true or false. If I want a fill-in-the-blank question, it has one
DataBit instance for the statement and one for each answer that belongs
in the blanks. For a multiple-choice question, there are several bits:
the question, each possible answer, and a bit saying which answer is
correct.

Obviously, trying to represent these things directly from the database
is a bit of a pain, so I have non-model classes that translate from the
representation in the database to a more natural representation and vice
versa. These classes also create the forms (as in django.newforms) that
I display.

Could I pickle one of these non-model objects and use the pickled value
in a hidden field to store everything all at once and then get it back
really easily? I've never used pickle, so I'm a little apprehensive that
there are gotchas I don't know about, but, if it works the way it's
advertised, it seems an easy way to dump something into the preview and
then reconstruct it on the way out. Are there any gotchas I should be
aware of before I start?

Thanks for reading all of that,
Todd


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Re: Announcing Django 0.96!

[James Bennett]

On 3/24/07, Marc Fargas Esteve <[EMAIL PROTECTED]> wrote:
> Maybe the release notes should say that newforms do not yet support File
> uploads in an easy way (see #3297) just to warn people moving from oldforms
> to newforms ;)

The release notes, I believe, mention that newforms is still under
development; trying to run down every item in the library would
probably be out of scope for the release notes for Django itself :)

-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: Announcing Django 0.96!

[Marc Fargas Esteve]

Hi James,
Maybe the release notes should say that newforms do not yet support File
uploads in an easy way (see #3297) just to warn people moving from oldforms
to newforms ;)

Cheers,
Marc.

On 3/23/07, James Bennett <[EMAIL PROTECTED]> wrote:
>
>
> We're pleased to announce the release of Django 0.96 today; this
> release involves cleanup and stabilization of features from the 0.95
> release, along with some nice new features: an integrated testing
> framework, the first release of the newforms library, and a ton of
> useful improvements.
>
> There are also a few backwards-incompatible changes, documented in the
> release notes[1], but for most users this should be a simple and
> painless upgrade. One particular change, however, bears mentioning
> explicitly: users of MySQL who are relying on older versions of the
> MySQLdb adapter will need to upgrade their copy of MySQLdb to at least
> version 1.2.1p2 or switch to the new "mysql_old" backend until they
> can upgrade. Check out the release notes for details on this and all
> other backwards-incompatible changes.
>
> The full release, as always, is available from the "download page on
> djangoproject.com:
> http://www.djangoproject.com/download/
>
> A huge round of thanks is due to everyone who's reported bugs,
> submitted patches, triaged tickets and helped out in countless other
> ways; we'd never be able to do this without you :)
>
> [1] http://www.djangoproject.com/documentation/release_notes_0.96/
>
> --
> "Bureaucrat Conrad, you are technically correct -- the best kind of
> correct."
>
> >
>

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Re: ordering on a ForeignKey field in the admin

[omat * gezgin.com]

I still need to solve this issue. Am I missing something obvious, or
can this be a bug?

Thanks again...
oMat



On 23 Mart, 14:37, "omat * gezgin.com" <[EMAIL PROTECTED]> wrote:
> I have two models, Artist and Album. I am able to add new albums via
> the admin interface but the list of artists in the album edit / add
> pages are not ordered.
>
> If I am not getting the documentation wrong, this should be achieved
> simply by stating the default ordering in the meta class. My
> (simplified) models are as follows:
>
> class Artist(models.Model):
> name = models.CharField(maxlength = 100, core = True)
>
> class META:
> ordering = ['name']
>
> class Admin:
> list_display = ['name']
>
> class Album(models.Model):
> title = models.CharField(maxlength = 100, core = True)
> artist = models.ForeignKey(Artist)
>
> class Admin:
> pass
>
> The artist list appears as a multiple select box as it should be, but
> it is not ordered.
>
> Thanks for any help...


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Re: Custom SQL - Do I need to close the connection?

[James Bennett]

On 3/22/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Do I need to close the connection after I'm done with the results?
> I've also recently started receiving 'too many connections' errors...
> and thought this might be the reason?

Django will automatically close the connection at the end of the
request, so you don't need to manually close it. Django also keeps
only one DB connection per request, regardless of how you use it
(e.g., whether you just use the Django ORM or grab the connection
manually and execute custom SQL), so it shouldn't affect how many
connections you have.

Usually when I get that error message it's because someone else on my
shared server turned on some Wordpress plugins and is doing a hundred
queries per page on their blog.

-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Re: syncdb & postgreSQL

[jewe]

OK, here are a piece of backgrounds:

OS: Windows XP
The version of Django is 0.95.1 (stable version; not svn), the version
of PostgreSQL is 8.2. I use psycopg2-2.0.6b1.win32-py2.5-pg8.2.1-
release for the databasebinding.

The error comes from Django:

Following steps (the applicationname is tm):

- validate -> 0 errors found
- syncdb -> creating tables and installing some initial data; all
works fine
- reset -> error:

=

Error: tm couldn't be installed. Possible reasons:
  * The database isn't running or isn't configured correctly.
  * At least one of the database tables already exists.
  * The SQL was invalid.
Hint: Look at the output of 'django-admin.py sqlreset tm'. That's the
SQL this command wasn't able to run.
The full error: constraint "team_id_referencing_tm_team_team_id" does
not exist

=

- sqlreset:

(abstract)
=

BEGIN;
...
ALTER TABLE "tm_player" DROP CONSTRAINT
"team_id_referencing_tm_team_team_id";
...
";

=

- a look in the databaseinterfcae (pgAdmin):
  the name of the constraint in table tm_player is:
team_id_referencing_tm_team_team_id_1


I don't know, what can I do. For every changes in the db-model, I have
delete all tables by hand and but now I can use syncdb.


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Re: Authentication Issues...

[mediumgrade]

Totally fixed me up. Thanks!

On Mar 19, 9:33 am, "James Bennett" <[EMAIL PROTECTED]> wrote:
> On 3/19/07, mediumgrade <[EMAIL PROTECTED]> wrote:
>
> > I am not sure what the difference is between RequestContext and
> > Context (I am still fairly new to Django and Python).
>
> RequestContext automatically adds some extra variables to the context
> of every template that uses it; exactly which variables depends on the
> TEMPLATE_CONTEXT_PROCESSORS setting, but the default set includes a
> variable called 'user', which lets you do things like '{% if
> user.is_authenticated %}' in a template.
>
> To use it you'd want to do something like this:
>
> from django.template import RequestContext
>
> def home(request):
> if not request.user.is_authenticated():
> return render_to_response('login_error.html', {},
> context_instance=RequestContext(request))
> else:
> return render_to_response('index.html', {},
> context_instance=RequestContext(request))
>
> And also note that Django will happily help you out with forcing
> login; you could write the view like this:
>
> from django.template import RequestContext
> from django.contrib.auth.decorators import login_required
>
> def home(request):
> return render_to_response('index.html', {},
> context_instance=RequestContext(request))
>
> home = login_required(home)
>
> The 'login_required' decorator will accomplish the same thing as your
> manual authentication check -- if the user isn't logged in, it will
> force them to log in and then go on to your view.
>
> --
> "Bureaucrat Conrad, you are technically correct -- the best kind of correct."


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