[Django] #26023: Importing GenericForeignKey on Django 1.9
Django
--------------------------------------+----------------------------------
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: new
Component: contrib.contenttypes | Version: 1.9
Severity: Normal | Keywords: generic foreign keys
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
--------------------------------------+----------------------------------
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.
}}}
My guess is contenttypes is attempting to build the list of models, but
failing because there is no app to initialize.
--
Ticket URL: <https://code.djangoproject.com/ticket/26023>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: new
contrib.contenttypes |
Severity: Normal | Resolution:
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
Changes (by timgraham):
* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0
Comment:
Could you clarify the use case? You need to have
`django.contrib.contentypes` in `INSTALLED_APPS`, I believe.
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:1>
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: new
contrib.contenttypes |
Severity: Normal | Resolution:
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Easy pickings: 0 | UI/UX: 0
Description changed by Chris7:
Old description:
New description:
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.
--
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:2>
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: new
contrib.contenttypes |
Severity: Normal | Resolution:
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Easy pickings: 0 | UI/UX: 0
Comment (by Chris7):
The case is for the app [https://github.com/wooey/Wooey/ Wooey] and this
[https://github.com/wooey/Wooey/issues/101 issue].
We have an option that bootstraps the installation process which entails
setting up Django project with pre-determined settings. For compatibility
with older versions of Django, there is a compatibility shim to handle
cases like GFK's import location being changed and the template engine's
get_string method. So at the onset, there is no INSTALLED_APPS. It's a
python script importing GFK. I could move these imports to another shim
(or do some other workarounds) but this approach works in other Django
versions -- although it could entirely be fortunate this behavior was not
flagged.
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:3>
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: new
contrib.contenttypes |
Severity: Normal | Resolution:
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Easy pickings: 0 | UI/UX: 0
Comment (by timgraham):
I'm not sure about fixing the issue in general, but in that case I'd
suggest dropping compatibility with Django < 1.8 since those versions are
unsupported.
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:4>
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: closed
Component: | Version: 1.9
contrib.contenttypes |
Severity: Normal | Resolution: invalid
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Easy pickings: 0 | UI/UX: 0
Changes (by aaugustin):
* status: new => closed
* resolution: => invalid
Comment:
You must call `django.setup()` as highlighted in the 1.7 release notes.
https://docs.djangoproject.com/en/1.7/releases/1.7/#standalone-scripts
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:5>
Django
Reporter: Chris7 | Owner: nobody
Type: Bug | Status: closed
Component: | Version: 1.9
contrib.contenttypes |
Severity: Normal | Resolution: invalid
Keywords: generic foreign | Triage Stage:
keys | Unreviewed
Has patch: 0 | Needs documentation: 0
Easy pickings: 0 | UI/UX: 0
Comment (by Chris7):
An additional error arises for that case:
{{{
>>> from django.conf import settings
>>> settings.configure()
>>> import django
>>> django.setup()
>>> from django.contrib.contenttypes.fields import GenericForeignKey
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 103, in __new__
"application was loaded. " % (module, name))
RuntimeError: Model class django.contrib.contenttypes.models.ContentType
doesn't declare an explicit app_label and either isn't in an application
in INSTALLED_APPS or else was imported before its application was loaded
}}}
I understand this isn't a normal situation. But should importing the GFK
field really cause the application loading logic to execute?
--
Ticket URL: <https://code.djangoproject.com/ticket/26023#comment:6>