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RuntimeError: Model class django.contrib.sessions.models.Session doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS #155

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khaliullin opened this issue Nov 30, 2022 · 5 comments
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RuntimeError: Model class django.contrib.sessions.models.Session doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS #155

khaliullin opened this issue Nov 30, 2022 · 5 comments
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@khaliullin
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Does this library support Django 3.2.6?

I did the following steps according to documentation:

  • In setting.py INSTALLED_APPS block I replaced django.contrib.sessions to user_sessions
  • In setting.py MIDDLEWARE replaced django.contrib.sessions.middleware.SessionMiddleware to user_sessions.middleware.SessionMiddleware
  • In setting.py added
    SESSION_ENGINE = 'user_sessions.backends.db'
    SILENCED_SYSTEM_CHECKS = ['admin.E410']
  • In projects main urls.py added path('', include('user_sessions.urls', namespace='user_sessions'))
    When I am making python manage.py migrate I get the following error:
    RuntimeError: Model class django.contrib.sessions.models.Session doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

Difference in versions

Latest version in release notes is 2.0.0
But in pypi.org the latest version is 1.7.1.

I have installed 1.7.1 using pip. How can I get the 2.0.0 version? Maybe this would fix the error I get.

  • Python version: 3.8.10
  • Django version: 3.2.6
  • django-otp version:
  • django-user-sessions version: 1.7.1
@WhyNotHugo
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Looks like you're trying to use django.contrib.sessions.models.Session, but this model is provided by the contrib-app that is replaced by this one.

Can you post the full traceback?

@khaliullin
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@WhyNotHugo
I removed default django session app and middleware.

Here is my full log

Starting the server

/user/app/.venv/bin/python /user/app/manage.py runserver 8000 
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/user/app/.venv/lib/python3.8/site-packages/sentry_sdk/integrations/threading.py", line 69, in run
    reraise(*_capture_exception())
  File "/user/app/.venv/lib/python3.8/site-packages/sentry_sdk/_compat.py", line 54, in reraise
    raise value
  File "/user/app/.venv/lib/python3.8/site-packages/sentry_sdk/integrations/threading.py", line 67, in run
    return old_run_func(self, *a, **kw)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "/user/app/.venv/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 110, in inner_run
    autoreload.raise_last_exception()
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception
    raise _exception[1]
  File "/user/app/.venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 375, in execute
    autoreload.check_errors(django.setup)()
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "/user/app/.venv/lib/python3.8/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/user/app/.venv/lib/python3.8/site-packages/django/apps/registry.py", line 122, in populate
    app_config.ready()
  File "/user/app/.venv/lib/python3.8/site-packages/django/contrib/admin/apps.py", line 27, in ready
    self.module.autodiscover()
  File "/user/app/.venv/lib/python3.8/site-packages/django/contrib/admin/__init__.py", line 24, in autodiscover
    autodiscover_modules('admin', register_to=site)
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/module_loading.py", line 47, in autodiscover_modules
    import_module('%s.%s' % (app_config.name, module_to_search))
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/user/app/landing/admin.py", line 13, in <module>
    from settings.admin import SettingsAdmin
  File "/user/app/settings/admin.py", line 39, in <module>
    class GlobalSettingsAdmin(SettingsAdmin):
  File "/user/app/.venv/lib/python3.8/site-packages/django/contrib/admin/decorators.py", line 100, in _model_admin_wrapper
    admin_site.register(models, admin_class=admin_class)
  File "/user/app/.venv/lib/python3.8/site-packages/django/contrib/admin/sites.py", line 141, in register
    self._registry[model] = admin_class(model, self)
  File "/user/app/settings/admin.py", line 27, in __init__
    model.load()
  File "/user/app/core/models.py", line 3682, in load
    return cls.objects.get_or_create()[0]
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 581, in get_or_create
    return self.get(**kwargs), False
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 431, in get
    num = len(clone)
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 262, in __len__
    self._fetch_all()
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 1324, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 47, in __iter__
    db = queryset.db
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/query.py", line 1253, in db
    return self._db or router.db_for_write(self.model, **self._hints)
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/utils.py", line 239, in _route_db
    for router in self.routers:
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/utils.py", line 230, in routers
    router = import_string(r)()
  File "/user/app/.venv/lib/python3.8/site-packages/django/utils/module_loading.py", line 17, in import_string
    module = import_module(module_path)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/user/app/main/dbrouters/primary_router.py", line 6, in <module>
    from django.contrib.sessions.models import Session
  File "/user/app/.venv/lib/python3.8/site-packages/django/contrib/sessions/models.py", line 10, in <module>
    class Session(AbstractBaseSession):
  File "/user/app/.venv/lib/python3.8/site-packages/django/db/models/base.py", line 113, in __new__
    raise RuntimeError(
RuntimeError: Model class django.contrib.sessions.models.Session doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

@WhyNotHugo
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WhyNotHugo commented Dec 26, 2022 via email

@blag
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blag commented Oct 9, 2023

@khaliullin Any objections to closing this?

@WhyNotHugo
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My above message is garbled up, but to sumarise:

The error message ends with:

RuntimeError: Model class django.contrib.sessions.models.Session doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

This says django.contrib.sessions.models.Session. That's not the model provided by this library, it's the one provided by django.contrib.sessions. You're importing the wrong model.

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@blag @WhyNotHugo @khaliullin