Apps aren't loaded yet.

Hello,

I try to use this app but I have a problem with the configuration.

The name of my app : main_app

apps.py of main_app :

from django.apps import AppConfig
from actstream import registry

class MainAppConfig(AppConfig):
    name = 'main_app'

def ready(self):
    registry.register(self.get_model('Inscrit'))

init of main_app : default_app_config = 'main_app.apps.MainAppConfig'

settings.py [Installed_apps] :

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.humanize',
    'django.contrib.sites',
    'bootstrapform',
    'main_app',
    'actstream',
]

I have this error :

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 350, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 342, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 176, in fetch_command
    commands = get_commands()
  File "/usr/local/lib/python2.7/dist-packages/django/utils/lru_cache.py", line 100, in wrapper
    result = user_function(*args, **kwds)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 71, in get_commands
    for app_config in reversed(list(apps.get_app_configs())):
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 137, in get_app_configs
    self.check_apps_ready()
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 124, in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

I read the #272 but it doesn’t help me…

BUT when I write from actstream import registry inside def ready, it works but why ? :octocat:

[dolugen]

I remember having this issue. I think I just re-ordered INSTALLED_APPS a bit.

[ghost]

tl;dr: the band-aid is to do something like this in your apps.py

class YourAppConfig(AppConfig):
    name = "yourapp"
    def ready(self):
        from actstream import registry
        registry.register(self.get_model('yourapp'))

Why? Because registry is not imported until ready() is called. If registry is imported beforehand, we see in @szechyjs 's stack trace that actstream.compat imports fields from django.contrib.contentypes. This module imports the model ContentType. See: https://docs.djangoproject.com/en/1.9/ref/applications/#how-applications-are-loaded . “In other words, your applications’ root packages and the modules that define your application configuration classes shouldn’t import any models, even indirectly.”

To completely fix this issue, we have to somehow prevent any other models imported indirectly before we can use actstream’s registry module.