python - Django 模型实例仅在再次调用 objects.get() 后更新(DRF 测试用例)

Question

我有一个 APIView (DRF)，我在其中将用户 is_active 字段设置为 False 而不是删除他，一切都按预期进行，但是当我尝试进行测试时出现有线行为对于 View 的情况，我尝试在调用 ApiView 后测试字段“is_active”是否为 False，但如果稍微更改代码并在调用后使用相同的用户电子邮件调用 user.objects.get()，它仍然为“True” ApiView，新实例字段is_active为False。

我从来没有遇到过这种行为，有人能解释一下背后的原因吗？谢谢!

这个测试通过了:

def test_delete_account(self):
        self.authentication() # create user and log him in
        user = User.objects.get(email=self.sample_user['email'])
        self.assertEqual(user.is_active, True)
        response = self.client.post(reverse('delete-account'))
        self.assertEqual(response.status_code, status.HTTP_204_NO_CONTENT)
        user = User.objects.get(email=self.sample_user['email']) 
        self.assertEqual(user.is_active,False)

这个测试失败了:

def test_delete_account(self):
        self.authentication() # create user and log him in
        user = User.objects.get(email=self.sample_user['email'])
        self.assertEqual(user.is_active, True)
        response = self.client.post(reverse('delete-account'))
        self.assertEqual(response.status_code, status.HTTP_204_NO_CONTENT)
        self.assertEqual(user.is_active,False) # FAILS HERE

删除帐户 ApiView:

class DeleteAccountAPIView(GenericAPIView):

    permission_classes = (permissions.IsAuthenticated,)

    def post(self, request):
        user = self.request.user
        user.is_active = False
        user.save()
        return  Response(status=status.HTTP_204_NO_CONTENT)

Answer 1

在您的测试中，您正在调用“远程”请求，更改在“远程”中:

     client ---- (call via post) --> remote 
   (the test)                   (django web app)
       |                               |
       ---------------------------------
                     |
                 database

事情是这样的:

# you get a user from database
user = User.objects.get(email=self.sample_user['email'])

# you make a post to 'remote' server
response = self.client.post(reverse('delete-account'))

# no changes should be in 'client' side
self.assertEqual(user.is_active,True)

# when you refresh data from database
user = User.objects.get(email=self.sample_user['email']) 

# you get the current database data that contains changes from remote
self.assertEqual(user.is_active,False)