Example can't run correctly.

[petrewoo]

Environment:

Request Method: GET Request URL: http://localhost:8888/api/

Django Version: 1.9 Python Version: 2.7.14 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'rest_framework_mongoengine', 'mongoengine.django.mongo_auth', 'app', 'users'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware']

Traceback:

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response

149. response = self.process_exception_by_middleware(e, request)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response

147. response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view

58. return view_func(*args, **kwargs)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/views/generic/base.py" in view

68. return self.dispatch(request, *args, **kwargs)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/views.py" in dispatch

466. response = self.handle_exception(exc)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/views.py" in dispatch

454. self.initial(request, *args, **kwargs)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/views.py" in initial

376. self.perform_authentication(request)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/views.py" in perform_authentication

310. request.user

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/request.py" in getattribute

353. return super(Request, self).getattribute(attr)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/request.py" in user

193. self._authenticate()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/request.py" in _authenticate

316. user_auth_tuple = authenticator.authenticate(self)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/rest_framework/authentication.py" in authenticate

123. if not user or not user.is_active:

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/utils/functional.py" in inner

204. self._setup()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/utils/functional.py" in _setup

340. self._wrapped = self._setupfunc()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/auth/middleware.py" in

22. request.user = SimpleLazyObject(lambda: get_user(request))

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/auth/middleware.py" in get_user

10. request._cached_user = auth.get_user(request)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/auth/init.py" in get_user

167. user_id = _get_user_session_key(request)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/auth/init.py" in _get_user_session_key

59. return get_user_model()._meta.pk.to_python(request.session[SESSION_KEY])

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py" in getitem

48. return self._session[key]

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py" in _get_session

198. self._session_cache = self.load()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/contrib/sessions/backends/db.py" in load

33. expire_date__gt=timezone.now()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/manager.py" in manager_method

122. return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/query.py" in get

381. num = len(clone)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/query.py" in len

240. self._fetch_all()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/query.py" in _fetch_all

1074. self._result_cache = list(self.iterator())

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/query.py" in iter

52. results = compiler.execute_sql()

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql

852. cursor.execute(sql, params)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/backends/utils.py" in execute

79. return super(CursorDebugWrapper, self).execute(sql, params)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/backends/utils.py" in execute

64. return self.cursor.execute(sql, params)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/utils.py" in exit

95. six.reraise(dj_exc_type, dj_exc_value, traceback)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/backends/utils.py" in execute

64. return self.cursor.execute(sql, params)

File "/Users/alex/.virtualenvs/drfm_demo/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py" in execute

323. return Database.Cursor.execute(self, query, params)

Exception Type: OperationalError at /api/ Exception Value: no such table: django_session

[BurkovBA]

Hi, @petrewoo.

Did you run python manage.py makemigrations and python manage.py migrate before launching the server?

You should create those django tables in SQLite with initial migration to keep django happy.

[petrewoo]

Hi, @BurkovBA I didn't do that before launching the server. Can you tell me why i should do this? I use postman and httpie request http://localhost:8888/api/ everything works fine. But when i use chrome this error occurred.😂😂 I will try again litter.

[BurkovBA]

@petrewoo Probably, the difference between postman and browser is due to the format of response.

When you're using postman, it requests JSON response, so JSONRenderer is used by Django REST Framework internally.

But when you go with browser, Django REST Framework is trying to use the Browsable API, which relies on core django functionality. And django wants its tables in relational database created for normal functioning - that's why you were getting the error.

[petrewoo]

@BurkovBA After run python manage.py makemigrations and python manage.py migrate before launching the server, It works finally. Thank you so much.