Re: how (Tosca)Widgets fits into MVC concept
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Pagination research
Evening... as some of you may have read on IRC I'm trying to use webhelpers' pagination package. That's a pretty frustrating trip that's more a pydoc text adventure than something that saves me more time than re-inventing the wheel. Anyway... I'm using SQLAlchemy and have defined my Table()s in models/__init__.py. To use the pagination I used from webhelpers import pagination in the lib/helpers.py. Then in a controller I'm trying to paginate like this: domains_paginator, domain_set = \ h.pagination.paginate( model.session_context.current.query(model.DnsDomain), page=0, per_page=100 ) set_count = int(domains_paginator.current) total_pages = len(domains_paginator) While this works it looks very ugly to me. To get a paginable query object of my model I have to call model.session_context.current.query(model.DnsDomain). E. So I used the source of webhelpers/pagination/orm.py and found out that I can feed the webhelpers.pagination.paginate() function either - a Table object or - a Query object Since the above query object was ugly I tried to feed the Table object directly: domains_paginator, domain_set = \ h.pagination.paginate( model.powerdns_domains_table, page=0, per_page=100 ) set_count = int(domains_paginator.current) total_pages = len(domains_paginator) This looks a lot cleaner but doesn't work. The traceback I get is: File '/home/chaas/projekte/dnsdhcp/dnsdhcp/controllers/domains.py', line 12 in index domains_paginator, domain_set = h.pagination.paginate(model.powerdns_domains_table, page=0, per_page=100) File '/usr/lib/python2.4/site-packages/WebHelpers-0.2.2-py2.4.egg/webhelpers/pagination/__init__.py', line 48 in paginate item_count = len(collection) File '/usr/lib/python2.4/site-packages/WebHelpers-0.2.2-py2.4.egg/webhelpers/pagination/orm.py', line 56 in __len__ return self.fn([func.count(1)], from_obj=[s]) NameError: global name 'func' is not defined And at least in the webhelpers/pagination/orm.py there is no reference to any 'func' object. Might this be a bug? Relevant part of the orm.py: class SQLAlchemyLazyTable(Partial): def __getitem__(self, key): if not isinstance(key, slice): raise Exception, SQLAlchemyLazy doesn't support getitem without slicing limit = key.stop - key.start offset = key.start fn = self.fn self.fn = fn.select results = self(limit=limit, offset=offset).execute() self.fn = fn return results def __len__(self): s = self.fn.select(*self.args, **self.kw) return self.fn([func.count(1)], from_obj=[s]) # --- bug? Any other attempt to use a 'partial' (whatever that is) leads to the string You shouldn't have this (which is not really a helpful error message). It appears like paginate() should be able to accept an sqlalchemy.Query() object (which in Pylons's context is model.session_context.current.query(model.DnsDomain)) or an sqlalchemy.Table() object (which in Pylon should mean a models.mymapper coming from assign_mapper()). Wow, this email is pretty cryptic already. :) I hope someone has an idea on how to use pagination correctly. Ben implied on IRC that the pagination stuff could use a facelift. Any comments? Should I put this mail into a Trac ticket? Does anyone have a good example on how to use pagination? The documentation at http://pylonshq.com/WebHelpers/module-webhelpers.pagination.html is poor. I'm willing to send in patches or anything. Just teach me how the holy thing works. :) Thanks. Kindly Christoph --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: UTF-8 ... help
Hello,
I have similar problem.
I'm using Mako templates with sqlalchemy. In templates I have line:
# coding: utf-8
OK, I can put UTF-8 chars into templates. But I can't do:
${h.options_for_select(
(
(u'brudnopis', u'draft'),
(u'opublikowany', u'published'),
(u'usunięty', u'hidden')
), c.frm_status)}
or:
li class=${h.cond(h.current_page('/admin/news/list'), 'selected',
'')}${h.link_to_unless_current(u'Zarządzaj',
h.url(controller='admin_news', action='list'))}/a/li
or neither:
${asdą}
because it raise an exception:
type 'exceptions.UnicodeEncodeError': 'ascii' codec can't encode
character u'\u0119' in position 110: ordinal not in range(128)
selfcompiler.transformer.Transformer instance at 0x423bde2c
textuh.options_for_select(\n\t\t\t\t(\n\t\t\t\t\t(u'brudnopis',
u'draft'),\n\t\t\t\t\t(u'opublikowany',
u'published'),\n\t\t\t\t\t(u'usuni\u0119ty', u'hidden')\n\t\t\t\t),
c.frm_status)
or similar.
Of course, files are encoded in UTF-8, every file created by me have
line:
# -*- coding: utf-8 -*-
or similar, I use only unicode objects, etc etc.
MySZ
PS. How can I do persuade sqlalchemy in Pylons to use Unicode objects?
For now I hack [...]/Pylons[...]/pylons/database.py, line 42:
engine = sqlalchemy.create_engine(uri, echo=echo, convert_unicode=True,
encoding='utf-8')
Is any simpler method? Without this sqlalchemy doesn't work with
strings with non-ascii chars :/
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Re: how (Tosca)Widgets fits into MVC concept
On Jan 25, 2007, at 12:42 PM, Ksenia wrote: On Jan 25, 11:31 am, Ksenia [EMAIL PROTECTED] wrote: Thanks for feedback! New google groups interface seems not to have accepted my reaction from yesterday :( Just testing now... (Ok, seems to work :) After reading al your helpfull reactions I see that my confusion with TG/TW widgets is more about it's implementation: - general widgets like TinyMCE, grids, js trees, select shuttle, etc. belong to the concept of helpers. I dont care how they made, where they are installed on the system - I just want to use them. So the egg system and TW are great for that. - domain-specific widgets, like product info, is something that I see as a template that should be in the products view directory. It makes more sense to me to see those widgets as clever templates with some extra python code in it. TW/TG widgets feels upside down for this use. Just the matter of taste I guess. Of course. It's up to you to decide which views are general enough to deserve encapsulation in a reusable component or could benefit from being clever templates (being clever meaning they know what static resources (js, css, images...) they need for rendering and pull them automatically when they're used in a page). But keep in mind, TW widgets are a superset of form widgets. Depends on your taste and style but widgets can be used for other things apart from validation (a js drop-down menu, for example). From a user's perspective they're just objects you can instantiate setting some initial state that affects how they behave and then be call them in a template to generate a chunk of markup. To sum up: they are equivalent of a template function but that can take care pulling static files and be encapsulated with all it's baggage into a reusable component. TW is just an API to create them, in fact, twForms ATM is more of a proof of concept which provides *very* basic widgets, they could be much enhanced with client-side scripting, styling, etc... Alberto --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Another XMLHttpRequest question
function () { ... } is the definition of an anonymous function. Like a
lambda in python.
On 1/25/07, Markm [EMAIL PROTECTED] wrote:
Hi Uwe
I am just begining here ... do you mind if I see that your complete (I
mean your controller and defs) code? For eg, I did not understand this
piece of code:
xhr.onreadystatechange = function()
What is this function() ??
I'm fighting with the same problem and it'll be very useful if I could
learn with you!
Thanks in advance.
Marcus
On 5 jan, 22:48, Uwe Feldtmann [EMAIL PROTECTED] wrote:
Robert Leftwich wrote:..snip That should be *onreadystatechange* not
onreadystatechage, i.e. there
is a missing n in change.Isn't peer programming wonderful. Thanks Robert.
I've been looking at that code all day and just couldn't see the typo.
New glasses needed perhaps.
It's all working now thanks.
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When does controllers/template/view get called?
I modified controllers/template/view to def view(self, url): raise TypeError, url print sys.stderr, url return render_response(/%s.myt % url) If I visit (for example) http://localhost:5001/nonexistent I don't see anything like a TypeError. Instead, I get this traceback: URL: http://localhost:5001/nonexistent File '/Users/skip/local/lib/python2.6/site-packages/Pylons-0.9.4.1-py2.6.egg/pylons/error.py', line 226 in respond app_iter = self.application(environ, detect_start_response) File '/Users/skip/local/lib/python2.6/site-packages/Paste-1.1.1-py2.6.egg/paste/httpexceptions.py', line 622 in __call__ self.send_http_response, catch=HTTPException) File '/Users/skip/local/lib/python2.6/site-packages/Paste-1.1.1-py2.6.egg/paste/wsgilib.py', line 226 in catch_errors_app app_iter = application(environ, start_response) File '/Users/skip/local/lib/python2.6/site-packages/PasteDeploy-1.1-py2.6.egg/paste/deploy/config.py', line 161 in __call__ app_iter = self.application(environ, start_response) File '/Users/skip/local/lib/python2.6/site-packages/Pylons-0.9.4.1-py2.6.egg/pylons/wsgiapp.py', line 263 in __call__ return self.app(environ, start_response) File '/Users/skip/local/lib/python2.6/site-packages/Beaker-0.6.2-py2.6.egg/beaker/cache.py', line 124 in __call__ return self.app(environ, start_response) File '/Users/skip/local/lib/python2.6/site-packages/Beaker-0.6.2-py2.6.egg/beaker/session.py', line 105 in __call__ response = self.wrap_app(environ, session_start_response) File '/Users/skip/local/lib/python2.6/site-packages/Routes-1.6.2-py2.6.egg/routes/middleware.py', line 76 in __call__ return self.app(environ, start_response) File '/Users/skip/local/lib/python2.6/site-packages/Pylons-0.9.4.1-py2.6.egg/pylons/wsgiapp.py', line 92 in __call__ raise Exception, No content returned by controller: %s % controller.__name__ Exception: No content returned by controller: TemplateController Where am I going wrong? Thx, Skip --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Another XMLHttpRequest question
Markm wrote:
I am just begining here ... do you mind if I see that your complete (I
mean your controller and defs) code? For eg, I did not understand this
piece of code:
I'm fighting with the same problem and it'll be very useful if I could
learn with you!
Hi Markus.
I see that Bob Ippolito has already explained the function() { ... }
definition - thanks Bob.
Most of the code I used was only to test out sending data back and forth
between the server and the browser without using html forms and would be
more confusing than it's worth so I'll sum up what I've learned from
experimentation and with the patient assistance of others on this list
(thank you all). If anything here is incorrect or could be done better
then please let us all know.
Simple rules I read somewhere:-
Use GET if the data you are sending to the server is less than 512 bytes
and can be sent on the url.
Use the POST method if the data is more than 512 bytes or needs to be
more secure.
---
Sending from the browser using GET:-
function toServerByGET(url, fct) {
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if ( xmlhttp.readyState==4 ) {
fct( xmlhttp.responseText );
}
};
xmlhttp.open(GET,url);
xmlhttp.send(null);
}
and is called like this
urlAndData = /controllerName/methodName/?parm1= + value1 +
amp;parm2= + value2;
toServer( urlAndData, responseHandler )
---
Sending from the browser using POST:-
function toServerByPOST( url, data, fct ) {
xmlhttp = new XMLHttpRequest();
xmlhttp.open( POST, url, true );
// note setRequestHeader must appear after .open and is used
// to encode the data as though it came from a form (thanks Robert)
xmlhttp.setRequestHeader( Content-Type,
application/x-www-form-urlencoded );
xmlhttp.onreadystatechange = function() {
if ( xmlhttp.readyState==4 ) {
fct( xmlhttp.responseText );
}
}
xmlhttp.send( data );
};
and is called like this
var data = {
id: 1,
parm1: value1
parm2: value2
}
toServerByPOST( /controllerName/methodName, data, responseHandler );
---
The method in the controller is the same in both instances:-
class ControllerNameController(BaseController):
def methodName(self):
value1 = request.params['parm1']
value2 = request.params['parm2']
return Response( responseData )
---
Hope this helps in some way.
Uwe.
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