I think you're overcomplicating things. Check this out:
https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#form-inheritance
http://chriskief.com/2013/06/30/django-form-inheritance/
Try this:
class ModelFormExtraFields(forms.ModelForm):
extra_field_1 = forms.CharField(required=False)
extra_field_2 = forms.CharField(required=False)
class Meta:
fields = ('extra_field_1', 'extra_field_2')
class ModelFormA(ModelFormExtraFields):
email = forms.CharField(required=False)
blah = forms.CharField(required=False)
class Meta(ModelFormExtraFields.Meta):
model = ModelA
fields = ModelFormExtraFields.Meta.fields + ('email', 'blah')
# or as the last fields
#fields = ('email', 'blah') + ModelFormExtraFields.Meta.fields
I don't even really think the Meta class in ModelFormA even needs to
inherit directly, so just having a straight Meta: class may save some
keystrokes, but I didn't test that.
-James
On Fri, Nov 14, 2014 at 6:15 AM, Michael Palumbo <
michael.palumb...@gmail.com> wrote:
> Thanks for your response James.
> I am not well familiar with the metaclasses, I do not really see how to do
> it.
>
> What do you think of adding the fields in the init this way?
>
> extra_fields = {'extra1': forms.CharField(required=False), 'extra2':
> forms.CharField(required=False)}
>
> class ModelFormA(forms.ModelForm):
> def __init__(self, *args, **kwargs):
> super(ModelFormA, self).__init__(*args, **kwargs)
> for name, field in extra_fields.iteritems():
> self.fields[name] = field
>
> Thanks
>
>
> On Thu, Nov 13, 2014 at 11:38 PM, James Schneider <jrschneide...@gmail.com
> > wrote:
>
>> Modify your Meta class to include the extra fields on the model form. The
>> Meta classes are not inherited.
>>
>> You may also need to override the save() method on your model form to
>> actually save the contents of those extra fields in the inherited form.
>>
>> -James
>> On Nov 13, 2014 6:32 PM, "Michael" <michael.palumb...@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> Why does the following not give a final model form with 3 fields?
>>> The two extra fields are not available. If I move them directly into the
>>> model form, it works but I wanted to declare these fields in a separate
>>> form because I plan on reusing them in several forms.
>>> Is there a way to do that?
>>>
>>> class FormA(forms.Form):
>>> extra_field_1 = forms.CharField(required=False)
>>> extra_field_2 = forms.CharField(required=False)
>>>
>>> class ModelFormA(FormA, forms.ModelForm):
>>> class Meta:
>>> model = ModelA
>>> fields = ['email']
>>>
>>> Thanks
>>> Mike
>>>
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