Walt, you're a lifesaver!
Many thanks for the great example. I only made a couple of minor
tweeks:
class AgencyForm(forms.ModelForm):
class Meta:
model = Agency
def __init__(self, *args, **kwargs):
super(AgencyForm, self).__init__(*args, **kwargs)
if self.instance.id:
if self.instance.state:
counties =
County.objects.filter(us_state=self.instance.state)
county_field = self.fields['counties'].widget
county_choices = []
if counties is None:
county_choices.append(('', '---------'))
for county in counties:
county_choices.append((county.id, county.name))
county_field.choices = county_choices
Kind regards,
Brandon
On Mar 14, 8:23 am, Walt <[email protected]> wrote:
> Here is an idea of what your forms.py should contain:
>
> class AgencyForm(ModelForm):
>
> class Meta:
> model = Agency
>
> def __init__(self, *args, **kwargs):
> super(AgencyForm, self).__init__(*args, **kwargs)
> if self.instance.id:
> if self.instance.state_id:
> counties =
> County.objects.filter(state=self.instance.state_id)
>
> county_field = self.fields['counties'].widget
> county_choices = []
> county_choices.append(('', '------'))
> for county in counties:
> county_choices.append((county.id, county.name))
> county_field.choices = county_choices
>
> Then in admin.py, make sure you have:
>
> class AgencyAdmin(admin.ModelAdmin):
> form = AgencyForm
>
> Hope this helps,
> Walt
>
> -~
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