tests.py 文件源码

def test_model_fields(self):
        f = Contact._meta.get_field("customer")
        self.assertIsInstance(f, CompositeForeignKey)
        l = Contact._meta.get_fields()
        self.assertIn("customer", [field.name for field in l])

        f2 = Customer._meta.get_field("contacts")
        self.assertIsInstance(f2, ForeignObjectRel)
        l2 = Customer._meta.get_fields()
        self.assertIn("contacts", [field.name for field in l2])

        self.assertIsNone(f.db_type(None))