Fixed #7853 -- Fixed another case of deleting inherited models with foreign key

        del_query.delete_batch_related(pk_list)

        update_query = sql.UpdateQuery(cls, connection)

        for field in cls._meta.fields:

        for field, model in cls._meta.get_fields_with_model():

            if (field.rel and field.null and field.rel.to in seen_objs and

                    filter(lambda f: f.column == field.column,

                    field.rel.to._meta.fields)):

                if model:

                    sql.UpdateQuery(model, connection).clear_related(field,

                            pk_list)

                else:

                    update_query.clear_related(field, pk_list)

    # Now delete the actual data.

class Child(Parent):

    name = models.CharField(max_length=10)

class SelfRefParent(models.Model):

    parent_data = models.IntegerField()

    self_data = models.ForeignKey('self', null=True)

class SelfRefChild(SelfRefParent):

    child_data = models.IntegerField()

__test__ = {'API_TESTS':"""

# Regression for #7350, #7202

>>> Supplier.objects.filter(restaurant=Restaurant(name='xx', address='yy'))

[]

# Regression test for #7853

# If the parent class has a self-referential link, make sure that any updates

# to that link via the child update the right table.

>>> obj = SelfRefChild.objects.create(child_data=37, parent_data=42)

>>> obj.delete()

"""}