ManytoMany Relation and Custom widget in Django

I have two models Category and Products. - a Product can have multiple Categories - a Category can have multiple Products. - Categories have a circular Foreign key, to itself. - not all Categories have the same depth level Example: Category A - Category A_1 - category A_2

ManytoMany Relation and Custom widget in Django

I have two models Categories and Products. A Product can have multiple Categories, a Category can have multiple Products. The Categories have a circular Foreign key, to itself. class Product: categories = models.ManyToManyField(Category) name = models.CharField(max_length=2