'Nested ArrayFields are permitted.'

def test_nested_field_checks(self):

    class MyModel(PostgreSQLModel, ):
        field = ArrayField(ArrayField(models.CharField()))
    model = MyModel()
    errors = model.check()
    self.assertEqual(len(errors), 1)
    self.assertEqual(errors[0].id, 'postgres.E001')
    self.assertIn('max_length', errors[0].msg)
