Using multiple forms to manage a model under admin

[Eiji Kobayashi]

Hello,

I have a question for all you django wizards. I want to use different forms for managing a model in Django's admin. I thought it's common problem, but I cannot find a good solution even after reading through google, stackoverflow and django's source code. (My apologies if this is a often asked newbie question).

For example, I have a model like this:

# users/models.py

...

REG_STATUS_TYPE = (

        ( 'queued', 'Queued' ),

        ( 'sent', 'Sent' ),

        ( 'accepted', 'Accepted' ),

        ( 'declined', 'Declined' ),

        ( 'blocked', 'Blocked' ),

    )

class RegistrationQueue(models.Model):

  user = models.ForeignKey(User)

  created = models.DateTimeField(default=datetime.datetime.now, editable=False)

  status = models.CharField(max_length=10, choices=REG_STATUS_TYPE, default='queued')

  accepted = models.DateTimeField(editable=False, null=True)

...

# users/admin.py

...

class RegistrationViewForm(models.ModelForm):

  class Meta:

    model = RegistrationQueue

class RegistrationAddForm(models.ModelForm):

  class Meta:

    model = User

class RegistrationQueueAdmin(admin.ModelAdmin):

    add_form = RegistrationAddForm

    view_form = RegistrationViewForm

    def get_form(self, request, obj=None, **kwargs):

        defaults = {}

        if obj is None:

            defaults.update({

                'form': self.add_form,

            })

        else:

            defaults.update({

                'form': self.view_form

            })

        defaults.update(kwargs)

        return super(RegistrationAdmin, self).get_form(request, obj, **defaults)

admin.site.register(RegistrationQueue, RegistrationQueueAdmin)

What I'm trying to do is simple really. When creating a new RegistrationQueue entry, I would like Django's admin to use a form derived from the User model (which would let me create a temporary user, and then I can take some of the information from that and other things to automatically create a RegistrationQueue entry).

However, when listing or changing the RegistrationQueue, I would like to use a form derived from the RegistrationQueue model.

So, as you can see above, I tried to replace ModelAdmin's get_form method with a custom one that just checks the incoming obj variable. If it's set to None, I know it's trying a create a new entry. Otherwise, it's something else.

The problem is that the admin always uses the form derived from the RegistrationQueue, and never the User. Whenever I click to add a RegistrationQueue, I get a form with fields belonging to the RegistrationQueue model.

Please tell me what I'm doing wrong. Thank you very much in advance.

Eiji