Please help me understand Django GenericInlineFormSet

Question

Django ContentTypes provides a GenericInlineFormSet, however the documentation does not explain how to use it, except for this test, which doesn't really explain it in a way I understand.

Please can you help me understand it?

Let's say I have the following classes

class Dog(models.Model):
    name = models.CharField(max_length=64)
    breed = models.CharField(blank=True, max_length=64)

    class Meta:
        verbose_name = 'Dog'


class Fish(models.Model):
    name = models.CharField(max_length=64)
    habitat = models.CharField(blank=True, max_length=64)

    class Meta:
        verbose_name = 'Fish'


class Pet(models.Model):
    content_type = models.ForeignKey(
                               ContentType,
                               limit_choices_to={'model__in':('dog', 'fish')},
                               verbose_name='Species'
                               )
    object_id = models.CharField(max_length=64,  verbose_name='Animal')
    object = generic.GenericForeignKey('content_type', 'object_id')

    owner = models.ForeignKey(Owner)

    class Meta:
        unique_together = [("content_type", "object_id")]

What does the view look like to display a form for a Pet?

Answer 1

GenericInlineFormSet works just like a standard inline formset, except that it uses generic relations rather than standard foreign keys.