python - Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet

Question

This is the traceback on my windows system.

Traceback (most recent call last):
  File "D:\AMD\workspace\steelrumors\manage.py", line 9, in <module>
    django.setup()
  File "D:\AMD\Django\django-django-4c85a0d\django\__init__.py", line 21, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "D:\AMD\Django\django-django-4c85a0d\django\apps\registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "D:\AMD\Django\django-django-4c85a0d\django\apps\config.py", line 197, in import_models
    self.models_module = import_module(models_module_name)
  File "C:\Python27\lib\importlib\__init__.py", line 37, in import_module
    __import__(name)
  File "C:\Python27\lib\site-packages\registration\models.py", line 15, in <module>
    User = get_user_model()
  File "D:\AMD\Django\django-django-4c85a0d\django\contrib\auth\__init__.py", line 135, in get_user_model
    return django_apps.get_model(settings.AUTH_USER_MODEL)
  File "D:\AMD\Django\django-django-4c85a0d\django\apps\registry.py", line 199, in get_model
    self.check_models_ready()
  File "D:\AMD\Django\django-django-4c85a0d\django\apps\registry.py", line 131, in check_models_ready
    raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.

And my manage.py looks like this:

import os
import sys
import django

if __name__ == "__main__":

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "steelrumors.settings")
    django.setup()
    from django.core.management import execute_from_command_line

    execute_from_command_line(sys.argv)

I get this error when i am trying to use registration app in Django 1.7

Answer 1

This is what solved it for us and these folks:

Our project started with Django 1.4, we went to 1.5 and then to 1.7. Our wsgi.py looked like this:

import os

from django.core.handlers.wsgi import WSGIHandler

os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.settings'
application = WSGIHandler()

When I updated to the 1.7 style WSGI handler:

import os

from django.core.wsgi import get_wsgi_application

os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.settings'
application = get_wsgi_application()

Everything works now.

Answer 2

Running these commands solved my problem (credit to this answer):

import django
django.setup()

However I'm not sure why I need this. Comments would be appreciated.

Answer 3

The issue is in your registration app. It seems django-registration calls get_user_module() in models.py at a module level (when models are still being loaded by the application registration process). This will no longer work:

try:
    from django.contrib.auth import get_user_model
    User = get_user_model()
except ImportError:
    from django.contrib.auth.models import User    

I'd change this models file to only call get_user_model() inside methods (and not at module level) and in FKs use something like:

user = ForeignKey(settings.AUTH_USER_MODEL)

BTW, the call to django.setup() shouldn't be required in your manage.py file, it's called for you in execute_from_command_line. (source)

Answer 4

Just encountered the same issue. The problem is because of django-registration incompatible with django 1.7 user model.

A simple fix is to change these lines of code, at your installed django-registration module::

try:
    from django.contrib.auth import get_user_model
    User = get_user_model()
except ImportError:
    from django.contrib.auth.models import User  

to::

from django.conf import settings
try:
    from django.contrib.auth import get_user_model
    User = settings.AUTH_USER_MODEL
except ImportError:
    from django.contrib.auth.models import User 

Mine is at .venv/local/lib/python2.7/site-packages/registration/models.py (virtualenv)

Answer 5

This works for me for Django 1.9 . The Python script to execute was in the root of the Django project.

    import django 
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "PROJECT_NAME.settings")
    django.setup()
    from APP_NAME.models import *

Set PROJECT_NAME and APP_NAME to yours

Answer 6

Another option is that you have a duplicate entry in INSTALLED_APPS. That threw this error for two different apps I tested. Apparently it's not something Django checks for, but then who's silly enough to put the same app in the list twice. Me, that's who.

Answer 7

Do you have a Python virtual environment that you need to enter before you run manage.py?

I ran into this error myself, and that was the problem.

Answer 8

I ran into this issue when I use djangocms and added a plugin (in my case: djangocms-cascade). Of course I had to add the plugin to the INSTALLED_APPS. But the order is here important.

To place 'cmsplugin_cascade' before 'cms' solved the issue.

Answer 9

install django-registration-redux==1.1 instead django-registration, if you using django 1.7

Answer 10

./manage.py migrate

This solved my issue

Answer 11

If you get this error in a context of creating ForeignKey relations between models. Example below raises AppRegistryNotReady: Models aren't loaded yet error.

from my_app.models import Workspace

workspace = models.ForeignKey(Workspace)

Then please try to reffer to a model as a string.

from my_app.models import Workspace

# One of these two lines might fix the problem.
workspace = models.ForeignKey('Workspace')
workspace = models.ForeignKey('my_app.Workspace')

Answer 12

Your manage.py is "wrong"; I don't know where you got it from, but that's not a 1.7 manage.py - were you using some funky pre-release build or something?

Reset your manage.py to the conventional, as below, and things Should Just Work:

#!/usr/bin/env python
import os
import sys

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{{ project_name }}.settings")

    from django.core.management import execute_from_command_line

    execute_from_command_line(sys.argv)

Answer 13

My Problem was from init.py . i made an app and wanted to do this :

from MY_APP import myfunc

instead of :

from MY_APP.views import myfunc

when i rolled back my changes to these parts . everything worked just fine.