Fixed #22047 -- detecting related_name clash with inheritance

        # Check clashes between accessor or reverse query name of `field`

        # and any other field name -- i. e. accessor for Model.foreign is

        # model_set and it clashes with Target.model_set.

        potential_clashes = rel_opts.fields + rel_opts.local_many_to_many

        potential_clashes = rel_opts.fields + rel_opts.many_to_many

        for clash_field in potential_clashes:

            clash_name = "%s.%s" % (rel_opts.object_name,

                clash_field.name)  # i. e. "Target.model_set"

        ]

        self.assertEqual(errors, expected)

    def test_m2m_to_m2m_with_inheritance(self):

        """ Ref #22047. """

        class Target(models.Model):

            pass

        class Model(models.Model):

            children = models.ManyToManyField('Child',

                related_name="m2m_clash", related_query_name="no_clash")

        class Parent(models.Model):

            m2m_clash = models.ManyToManyField('Target')

        class Child(Parent):

            pass

        errors = Model.check()

        expected = [

            Error(

                'Accessor for field Model.children clashes with field Child.m2m_clash.',

                hint=('Rename field Child.m2m_clash or add/change '

                      'a related_name argument to the definition '

                      'for field Model.children.'),

                obj=Model._meta.get_field('children'),

                id='E014',

            )

        ]

        self.assertEqual(errors, expected)

class ReverseQueryNameClashTests(IsolatedModelsTestCase):