Django 1.9: django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet

Question

I am trying to use this app https://github.com/benliles/django-chance in my application. My Django version is 1.9. I am getting the following error:

python mana         


        

Answer 1

The django-chance app you are using has not been updated in several years, and does not appear to support Django 1.9. You can either use a different app instead, or try to update it to work with Django 1.9.

This part of the traceback shows that it imports signals.py in the __init__.py, which tries to import models before the apps are loaded.

  File "/home/bewithaman/Projects/Event-Management-System/chance/__init__.py", line 1, in <module>
    from chance import signals
  File "/home/bewithaman/Projects/Event-Management-System/chance/signals.py", line 7, in <module>
    from chance.models import Registration

Remove this line from your chance/__init__.py file

from chance import signals

Then create an change/apps.py file, and define an app config class that imports the signals in the ready() method.

from django.apps import AppConfig

class ChanceConfig(AppConfig):

    def ready(self):
        from . import signals

Finally, update your INSTALLED_APPS setting to use your config.

INSTALLED_APPS = [
    ...
    'chance.apps.ChanceConfig',
    ...
]