Hi there,
I think what you've figured out is something along the same lines that
I'd like to do - but I'm very new to both Python and Django, so please
pardon my ignorance in that I really didn't understand the solution
you two spoke about.
Here's what I'd like to do...
I've two models, one foriegnKey'ed to the other.
in models.py:
class Market(models.model):
name = models.CharField(max_length=55)
class Alias(models.model):
market_id = models.ForeignKey(Market)
alias = models.CharField(max_length=255)
uripatern = models.CharField(max_length=255)
in admin.py:
class AliasAdmin(admin.ModelAdmin):
list_display = ('market_name', 'alias', 'uripatern')
list_filter = ['market_id']
search_fields = ['alias', 'uripatern', 'market_id__name']
So as you can see, I'd like to include the Market.name field rather
than the market_id, but I get "None" listed in the Admin display for
the Alias.
I've tried to add a function in the class Alias:
def market_name(self):
return self.market_id__name
But this just shows "None" in the admin screen for Aliases.
Thank you for your time and any help.
On Mar 11, 1:23 pm, Alex Jillard <[email protected]> wrote:
> Ah, that makes sense, thanks. With that change, I can use _meta.fields from
> my other model and everything works great.
>
> Thanks for the help
>
> On Wed, Mar 11, 2009 at 12:53 PM, Alex Gaynor <[email protected]> wrote:
>
> > On Wed, Mar 11, 2009 at 11:50 AM, Alex Jillard <[email protected]> wrote:
>
> >> 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 <[email protected]>wrote:
>
> >>> On Wed, Mar 11, 2009 at 11:18 AM, Alex Jillard <[email protected]> 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
> >>>> <[email protected]>wrote:
>
> >>>>> On Wed, Mar 11, 2009 at 10:33 AM, Alex Jillard <[email protected]>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
>
> > It's not self.fields you want to assign to, it's the Form class the you get
> > from calling the super(and it will actually be base_fields here since you're
> > dealing with a Form class instead of an instance).
>
> > 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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