id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 31533 Test client request's post body can be read multiple times, unlike real requests. Ben Beecher nobody "I have a DRF based signup flow that looks like this: {{{ def post(self, request, *args, **kwargs): register_serializer = self.get_serializer(data=request.data) login_serializer = settings.SERIALIZERS.token_create(data=request.data) if register_serializer.is_valid(): return self.create(request, *args, **kwargs) elif login_serializer.is_valid(): return TokenCreateView.as_view()(request=request._request) else: register_serializer.is_valid(raise_exception=True) }}} In short - try to sign a user up, then try to log them in. with the following test I get a good response: {{{ def test_register_but_really_login(self): response = self.client.post(self.url, self.form_data) self.assertEqual(response.status_code, s.HTTP_201_CREATED) response = self.client.post(self.url, self.form_data) self.assertEqual(response.status_code, s.HTTP_200_OK) }}} But when run for real I get this response with the same behavior: {{{ 10:57:18 backend.1 | 127.0.0.1 - - [03/May/2020 14:57:18] ""POST /auth/register/ HTTP/1.1"" 500 - 10:57:18 backend.1 | Traceback (most recent call last): 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/contrib/staticfiles/handlers.py"", line 68, in __call__ 10:57:18 backend.1 | return self.application(environ, start_response) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/wsgi.py"", line 133, in __call__ 10:57:18 backend.1 | response = self.get_response(request) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/base.py"", line 75, in get_response 10:57:18 backend.1 | response = self._middleware_chain(request) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/exception.py"", line 36, in inner 10:57:18 backend.1 | response = response_for_exception(request, exc) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/exception.py"", line 90, in response_for_exception 10:57:18 backend.1 | response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info()) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/exception.py"", line 125, in handle_uncaught_exception 10:57:18 backend.1 | return debug.technical_500_response(request, *exc_info) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django_extensions/management/technical_response.py"", line 37, in null_technical_500_response 10:57:18 backend.1 | six.reraise(exc_type, exc_value, tb) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/six.py"", line 702, in reraise 10:57:18 backend.1 | raise value.with_traceback(tb) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/exception.py"", line 34, in inner 10:57:18 backend.1 | response = get_response(request) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/base.py"", line 115, in _get_response 10:57:18 backend.1 | response = self.process_exception_by_middleware(e, request) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/core/handlers/base.py"", line 113, in _get_response 10:57:18 backend.1 | response = wrapped_callback(request, *callback_args, **callback_kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/views/decorators/csrf.py"", line 54, in wrapped_view 10:57:18 backend.1 | return view_func(*args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/views/generic/base.py"", line 71, in view 10:57:18 backend.1 | return self.dispatch(request, *args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 505, in dispatch 10:57:18 backend.1 | response = self.handle_exception(exc) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 465, in handle_exception 10:57:18 backend.1 | self.raise_uncaught_exception(exc) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 476, in raise_uncaught_exception 10:57:18 backend.1 | raise exc 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 502, in dispatch 10:57:18 backend.1 | response = handler(request, *args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/workspace/sampleapp/sampleapp/account/views.py"", line 31, in post 10:57:18 backend.1 | return TokenCreateView.as_view()(request=request._request) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/views/decorators/csrf.py"", line 54, in wrapped_view 10:57:18 backend.1 | return view_func(*args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/views/generic/base.py"", line 71, in view 10:57:18 backend.1 | return self.dispatch(request, *args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 505, in dispatch 10:57:18 backend.1 | response = self.handle_exception(exc) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 465, in handle_exception 10:57:18 backend.1 | self.raise_uncaught_exception(exc) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 476, in raise_uncaught_exception 10:57:18 backend.1 | raise exc 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/views.py"", line 502, in dispatch 10:57:18 backend.1 | response = handler(request, *args, **kwargs) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/djoser/utils.py"", line 36, in post 10:57:18 backend.1 | serializer = self.get_serializer(data=request.data) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 209, in data 10:57:18 backend.1 | self._load_data_and_files() 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 272, in _load_data_and_files 10:57:18 backend.1 | self._data, self._files = self._parse() 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 322, in _parse 10:57:18 backend.1 | stream = self.stream 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 196, in stream 10:57:18 backend.1 | self._load_stream() 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 302, in _load_stream 10:57:18 backend.1 | self._stream = io.BytesIO(self.body) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/rest_framework/request.py"", line 409, in __getattr__ 10:57:18 backend.1 | return getattr(self._request, attr) 10:57:18 backend.1 | File ""/home/bbeecher/.virtualenvs/sampleapp/lib/python3.8/site-packages/django/http/request.py"", line 292, in body 10:57:18 backend.1 | raise RawPostDataException(""You cannot access body after reading from request's data stream"") 10:57:18 backend.1 | django.http.request.RawPostDataException: You cannot access body after reading from request's data stream }}} The error message makes total sense - I am in fact trying to access the request body a second time. But I do the same thing in test successfully." Bug closed Testing framework 3.0 Normal invalid Unreviewed 0 0 0 0 0 0