Here's a nicer way to do it.
CHOICES = list ( (obj.code,obj.name) for obj in Scac.objects.all() )
Or you can always make a static method for it and call
Scac.objects_as_list()
El 21 de enero de 2012 05:01, Bill Beal <b.b...@eximflow.com> escribió:
> It looks like the Pythonic way is to create the list in
> models.py and invoke it from forms.py.
>
> Sorry about the heterogeneous names--some of
> them match the document the requirements were
> extracted from and others are more meaningful
> to me. The former were picked because we'll
> need a requirements cross-reference and they'll
> be easier to match up with the requirements.
> And the dashes in place of spaces--most of the
> code examples I see here are almost unreadable
> because of leading spaces disappearing.
> I saw one example of replacing all but the last
> leading space with '-', and it was more readable.
>
> Regards
>
> On Fri, Jan 20, 2012 at 11:22 PM, Dennis Lee Bieber <wlfr...@ix.netcom.com
> > wrote:
>
>> On Fri, 20 Jan 2012 19:44:16 -0800 (PST), Bill Beal
>> <b.b...@eximflow.com> wrote:
>>
>> Caveat: I've only looked at Django, but not in enough detail to be
>> "expert"; my comments are based upon basic Python syntax/semantics (my
>> apologies to the developers, but I work better with printed
>> documentation and Django is too much of a moving target for the few
>> books that did come out to be relevant four months later)
>>
>> >name 'scac_choicelist' is not defined at the marked
>> >line in my form:
>> >
>> Which is true -- it is not defined at that point. (NOTE: your
>> names
>> don't really help understanding the purpose of the variables <G>)
>>
>> >from django import forms
>> >from django.forms.fields import ChoiceField
>> >from myapp.models import *
>> >
>> >BOL_CODE_QUALIFIERS = (
>> > ('OB', 'Ocean Bill of Lading (OB)'),
>> > ('BM', 'House Bill of Lading (BM)'),
>> >)
>> >
>> >class BolForm(forms.Form):
>> >- scac = forms.ChoiceField(
>> >----- label=u'Ocean Carrier',
>> >----- choices=scac_choicelist()) ######
>> >- bill_of_lading = forms.CharField(
>> >----- label=u'Bill of Lading #', max_length=50)
>> >- bol_type = forms.ChoiceField(
>> >----- label=u'Type of B/L',
>> >----- choices=BOL_CODE_QUALIFIERS)
>> >
>> >Here's my model:
>> >
>> >from django.db import models
>> >
>> >class Scac(models.Model):
>> >- code = models.CharField(max_length=4)
>> >- name = models.CharField(max_length=60)
>> >
>> >- def __unicode__(self):
>> >--- return self.code
>> >
>> >- def scac_choicelist():
>> >--- q = Scac.objects.all()
>> >--- scaclist = []
>> >--- for x in q:
>> >----- scaclist.append((x.code, x.name))
>> >----- return scaclist
>>
>> Presuming the many "-"s represent indentation, "scac_choicelist"
>> is
>> a method of Scac. That means it should have at least one parameter: self
>>
>> def scac_choicelist(self):
>> scaclist = []
>> for item in self.objects.all():
>> scaclist.append((item.code, item.name))
>> return scaclist
>>
>> NOTE: based on your "-"s, your return statement is inside your loop, so
>> you'd be returning after processing only one element.
>>
>> NOW... In the form module you need to reference an instance of the
>> model! The method itself is not visible.
>>
>> >- scac = forms.ChoiceField(
>> >----- label=u'Ocean Carrier',
>> >----- choices=scac_choicelist()) ######
>> >
>>
>> Something like:
>>
>> scac = forms.ChoiceField( label=u"Ocean Carrier",
>>
>> choices=Scac().scac_choicelist())
>>
>> --
>> Wulfraed Dennis Lee Bieber AF6VN
>> wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/
>>
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>>
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