If I override get_form in ShelfAdmin, I still get the same errors.
self.fields is still None...any idea how to get access to the fields?
On Wed, Mar 11, 2009 at 12:26 PM, Alex Gaynor <alex.gay...@gmail.com> wrote:
>
>
> On Wed, Mar 11, 2009 at 11:18 AM, Alex Jillard <mez...@gmail.com> wrote:
>
>> Sorry Alex, I should have been more clear, I need to access the fields of
>> another model. I went ahead and did what you said to try and get it
>> working, and I was able to get the fields from the form's model, but I get
>> an error when trying to assign them to the choices property of my field.
>>
>> The following code gives the following error:
>>
>> class ShelfAdmin(admin.ModelAdmin):
>> sort_by = forms.ChoiceField(choices = ())
>>
>> def __init__(self, *args, **kwargs):
>> super(ShelfAdmin, self).__init__(*args, **kwargs)
>>
>> sort_by_choices = [('', '-------')]
>>
>> for field in self.model._meta.fields:
>> sort_by_choices.append((field.name,
>> field.verbose_name.title()))
>>
>> self.fields['sort_by'].choices = sort_by_choices
>>
>> admin.site.register(Shelf, ShelfAdmin)
>> TypeError at /admin/shelf/shelf/add/
>>
>> 'NoneType' object is unsubscriptable
>>
>>
>> Which I guess means that self.fields is None. Any idea why this might be
>> happening?
>>
>> On Wed, Mar 11, 2009 at 11:35 AM, Alex Gaynor <alex.gay...@gmail.com>wrote:
>>
>>>
>>>
>>> On Wed, Mar 11, 2009 at 10:33 AM, Alex Jillard <mez...@gmail.com> wrote:
>>>
>>>> I'm trying to populate an admin form with the field names of of a model
>>>> class, but I don't want to have to instantiate that model just to read it's
>>>> fields from _meta.
>>>>
>>>> I basically want to do something like this:
>>>>
>>>> self.fields['sort_by'].choices = [(field.verbose_name, field.name) for
>>>> field in field_list]
>>>>
>>>> field_list would be the equivalent to model_instance._meta.fields, but
>>>> without requiring the model instance.
>>>>
>>>> I know I could just grab an instance of the model from the database, but
>>>> I'd like this to work even if there are no instances currently saved.
>>>>
>>>>
>>>>
>>> _meta exists on the class as well, so on a ModelAdmin you can do
>>> self.model._meta.fields
>>>
>>> Alex
>>>
>>> --
>>> "I disapprove of what you say, but I will defend to the death your right
>>> to say it." --Voltaire
>>> "The people's good is the highest law."--Cicero
>>>
>>>
>>>
>>
>>
>>
> This occurs because self.fields isn't a dictionary of the field objects
> like it is on a ModelForm, you probably want to do all of this in the
> get_form() method.
>
>
> Alex
>
> --
> "I disapprove of what you say, but I will defend to the death your right to
> say it." --Voltaire
> "The people's good is the highest law."--Cicero
>
> >
>
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