断言失败，对象相同

Question

单元测试失败，出现以下异常：

def test_question_form(self):
    question = Question(question_text='Dummy question', pub_date=timezone.now(
    ) + datetime.timedelta(days=1), allow_multiple_choices=True)
    question_form = QuestionForm(
        {'question_text': question.question_text, 'pub_date': question.pub_date, 'allow_multiple_choices': 'on' if question.allow_multiple_choices else 'off'})
    self.assertTrue(question_form.is_valid())
    self.assertEqual(question_form.save(commit=False), question)

AssertionError: <Question: Dummy question> != <Question: Dummy question>

经过人工断言，物体似乎是相等的，我做错了什么？你知道吗

Answer 1

由于实例未保存，form.save返回的带有commit=False的模型实例和原始未保存的对象将永远不相等（除非您重写模型的__eq__方法来处理此问题）：

从docs：

The equality method is defined such that instances with the same primary key value and the same concrete class are considered equal, except that instances with a primary key value of None aren’t equal to anything except themselves