def test_foreign_key(self):
tm = TestModel()
tm.save()
self.assertEqual(tm.get_dirty_fields(), {})
foreign_model = ForeignTestModel(name="Foreign")
foreign_model.save()
tm.foreign = foreign_model
self.assertEqual(tm.get_dirty_fields(), {
'foreign_id': None})
tm.save()
self.assertEqual(tm.get_dirty_fields(), {})
