In my project I am mapping models inheriting from class A to models of type B using a GenericRelation via a third model, ABMapping.
models.py:
class A(models.Model):
b = GenericRelation(B)
class Meta:
abstract = True
class ABMapping(models.Model):
b = models.ForeignKey(B)
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey('content_type', 'object_id')
class B(models.Model):
x = ...
y = ...
In the Django admin when I try to delete an object of child of A, I get an error, "Cannot resolve keyword u'object_id' into field. Choices are: x, y, id, abmapping." It seems like it's trying to take a field from ABMapping, but find it in B.
As you can see, I stripped down my models to the bare minimum, but the problem still happens.
Even when I delete all the ABMappings for the object of a child class of A, the same problem occurs.
All the seemingly related questions on StackOverflow relate to people complaining that the cascade-delete isn't happening... but I can't even get the top-level delete to take place.
Everything with these models has been working fine for a while... except this issue of deleting from the admin, which never worked from the start. What am I missing here?
Thanks!
