Is there a way to combine TreeForeignKey and ChainedForeignKey?

Question

Django

Let's say we have a model like this:

class Subdivision(MPTTModel):
    subdivision = models.CharField(verbose_name="subdivision", max_length=255)
    affiliate = models.ForeignKey(Group)
    parent = TreeForeignKey("self", null=True, blank=True, related_name="childrens")

How to make it so that, including in the admin panel, it was impossible to select a parent outside the affiliate, i.e. like if the parent field was like a ChainedForeignKey tied to an affiliate?

Answer 1

Through clean () models will not work?