Importing GenericForeignKey on Django 1.9

[Chris Mitchell]

It appears it is not possible to import GenericForeignKey from outside a live Django project in 1.9. To reproduce this error:

from django.conf import settings
settings.configure()
from django.contrib.contenttypes.fields import GenericForeignKey

Produces:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/chris/.virtualenvs/wooey/local/lib/python2.7/site-packages/django/contrib/contenttypes/fields.py", line 5, in <module>
    from django.contrib.contenttypes.models import ContentType
  File "/home/chris/.virtualenvs/wooey/local/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 159, in <module>
    class ContentType(models.Model):
  File "/home/chris/.virtualenvs/wooey/local/lib/python2.7/site-packages/django/db/models/base.py", line 94, in __new__
    app_config = apps.get_containing_app_config(module)
  File "/home/chris/.virtualenvs/wooey/local/lib/python2.7/site-packages/django/apps/registry.py", line 239, in get_containing_app_config
    self.check_apps_ready()
  File "/home/chris/.virtualenvs/wooey/local/lib/python2.7/site-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.

This seems to be occurring because ModelBase is attempting to get the app config, but the configuration step has not occurred.

[Tim Graham]

Could you clarify the use case? You need to have django.contrib.contentypes in INSTALLED_APPS, I believe.