Question

我已经使用Django REST Framework从2.x版本更新到最后一个稳定版本（3.1.3）。在我的序列化程序中修复了一些已弃用的用法后，我运行python manage.py test以确保没有任何内容被破坏。

除了我正在测试无效REST请求（有意）的一些测试外，一切正常。例如：

def test_get_events_of_other_user(self):
    # Assume the setUp log the user1 with self.client 
    # and here, there is some code initializing an 
    # event for user2
    response = self.client.get("/event/123/")
    self.assertEqual(404, response.status_code)

视图集生成一个ORM查询，如MyEventModel.objects.get(user=request.user, pk=123)，这显然会在DRF中引发404异常，因为这里不应该返回任何对象^{_{（我知道，它应该是403 REST兼容...）}}。但这会引发TransactionManagementError：

Traceback (most recent call last):
  [...]
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/rest_framework/viewsets.py", line 85, in view
    return self.dispatch(request, *args, **kwargs)
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/rest_framework/views.py", line 456, in dispatch
    response = self.handle_exception(exc)
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/rest_framework/views.py", line 421, in handle_exception
    response = exception_handler(exc, context)
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/rest_framework/views.py", line 81, in exception_handler
    set_rollback()
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/rest_framework/compat.py", line 277, in set_rollback
    transaction.set_rollback(True)
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/django/db/transaction.py", line 215, in set_rollback
    return get_connection(using).set_rollback(rollback)
  File "/my_virtual_env_path/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 372, in set_rollback
    "The rollback flag doesn't work outside of an 'atomic' block.")
TransactionManagementError: The rollback flag doesn't work outside of an 'atomic' block.

看起来我的中间件之一是在视图之后进行一些SQL查询，然后点击transaction closed by DRF, since the 3.1.3。期望的行为（即获得404 NOT FOUND）适用于3.1.2 ......

有没有人知道如何避免回滚？这是DRF的误解吗？

Answer 1

这看起来像DRF中已经修复的错误。正如您所看到的，here他们已经更改了代码，以便它只在原子块中回滚。

由于没有发布新版本，您可以对已安装的代码应用相同的修补程序，也可以使用早期版本，直到3.1.3被取代。

Django REST Framework故意引发错误时的事务错误

1 个答案: