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 24468 signed_cookies backend crashes when switching from JSONSerializer to PickleSerializer Drife59 Tim Graham "If you do the setup as following (I know it is not recommended for security reason): SESSION_ENGINE = 'django.contrib.sessions.backends.signed_cookies' SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer' It basically breaks render of template. Here is the full stacktrace: {{{ File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 170, in _get_session return self._session_cache AttributeError: 'SessionStore' object has no attribute '_session_cache' During handling of the above exception, another exception occurred: Traceback (most recent call last): File ""/usr/local/lib/python3.4/dist-packages/django/core/handlers/base.py"", line 111, in get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File ""/views.py"", line 266, in if request.user.is_authenticated(): File ""/usr/local/lib/python3.4/dist-packages/django/utils/functional.py"", line 224, in inner self._setup() File ""/usr/local/lib/python3.4/dist-packages/django/utils/functional.py"", line 357, in _setup self._wrapped = self._setupfunc() File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/middleware.py"", line 22, in request.user = SimpleLazyObject(lambda: get_user(request)) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/middleware.py"", line 10, in get_user request._cached_user = auth.get_user(request) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/__init__.py"", line 152, in get_user user_id = request.session[SESSION_KEY] File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 49, in __getitem__ return self._session[key] File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 175, in _get_session self._session_cache = self.load() File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/signed_cookies.py"", line 20, in load salt='django.contrib.sessions.backends.signed_cookies') File ""/usr/local/lib/python3.4/dist-packages/django/core/signing.py"", line 145, in loads return serializer().loads(data) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/serializers.py"", line 17, in loads return pickle.loads(data) _pickle.UnpicklingError: invalid load key, '{'. During handling of the above exception, another exception occurred: Traceback (most recent call last): File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 170, in _get_session return self._session_cache AttributeError: 'SessionStore' object has no attribute '_session_cache' During handling of the above exception, another exception occurred: Traceback (most recent call last): File ""/usr/lib/python3.4/wsgiref/handlers.py"", line 137, in run self.result = application(self.environ, self.start_response) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/staticfiles/handlers.py"", line 64, in __call__ return self.application(environ, start_response) File ""/usr/local/lib/python3.4/dist-packages/django/core/handlers/wsgi.py"", line 187, in __call__ response = self.get_response(request) File ""/usr/local/lib/python3.4/dist-packages/django/core/handlers/base.py"", line 199, in get_response response = self.handle_uncaught_exception(request, resolver, sys.exc_info()) File ""/usr/local/lib/python3.4/dist-packages/django/core/handlers/base.py"", line 236, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 91, in technical_500_response html = reporter.get_traceback_html() File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 349, in get_traceback_html c = Context(self.get_traceback_data(), use_l10n=False) File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 307, in get_traceback_data frames = self.get_traceback_frames() File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 465, in get_traceback_frames 'vars': self.filter.get_traceback_frame_variables(self.request, tb.tb_frame), File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 232, in get_traceback_frame_variables cleansed[name] = self.cleanse_special_types(request, value) File ""/usr/local/lib/python3.4/dist-packages/django/views/debug.py"", line 187, in cleanse_special_types if isinstance(value, HttpRequest): File ""/usr/local/lib/python3.4/dist-packages/django/utils/functional.py"", line 224, in inner self._setup() File ""/usr/local/lib/python3.4/dist-packages/django/utils/functional.py"", line 357, in _setup self._wrapped = self._setupfunc() File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/middleware.py"", line 22, in request.user = SimpleLazyObject(lambda: get_user(request)) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/middleware.py"", line 10, in get_user request._cached_user = auth.get_user(request) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/auth/__init__.py"", line 152, in get_user user_id = request.session[SESSION_KEY] File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 49, in __getitem__ return self._session[key] File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/base.py"", line 175, in _get_session self._session_cache = self.load() File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/backends/signed_cookies.py"", line 20, in load salt='django.contrib.sessions.backends.signed_cookies') File ""/usr/local/lib/python3.4/dist-packages/django/core/signing.py"", line 145, in loads return serializer().loads(data) File ""/usr/local/lib/python3.4/dist-packages/django/contrib/sessions/serializers.py"", line 17, in loads return pickle.loads(data) _pickle.UnpicklingError: invalid load key, '{'. }}} Of course replace "" File ""/views.py"", line 266, in "" with your view. I tried different views and same result each time. Seems we cannot properly access to the session, for managing user. I found no workaround but to use a different serializer or session engine. " Cleanup/optimization closed contrib.sessions 1.7 Normal fixed PickleSerializer signed_cookies Drife59 Accepted 1 0 0 0 0 0