#30111: AppRegistryNotReady-Error when having contrib.postgres in INSTALLED_APPS
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Reporter: Jann Haber | Owner: (none)
Type: Bug | Status: new
Component: contrib.postgres | Version: 2.2
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by Jann Haber:
Old description:
> After an upgrade to Django 2.2a1, I found the following problem:
> {{{
> $ python manage.py help
> /home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel
> package will be renamed from release 2.8; in order to keep installing
> from binary please use "pip install psycopg2-binary" instead. For details
> see: <http://initd.org/psycopg/docs/install.html#binary-install-from-
> pypi>.
> """)
> Traceback (most recent call last):
> File "manage.py", line 21, in <module>
> main()
> File "manage.py", line 17, in main
> execute_from_command_line(sys.argv)
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/core/management/__init__.py", line 381, in
> execute_from_command_line
> utility.execute()
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/core/management/__init__.py", line 357, in execute
> django.setup()
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/__init__.py", line 24, in setup
> apps.populate(settings.INSTALLED_APPS)
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/apps/registry.py", line 91, in populate
> app_config = AppConfig.create(entry)
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/apps/config.py", line 116, in create
> mod = import_module(mod_path)
> File "/usr/lib/python3.7/importlib/__init__.py", line 127, in
> import_module
> return _bootstrap._gcd_import(name[level:], package, level)
> File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
> File "<frozen importlib._bootstrap>", line 983, in _find_and_load
> File "<frozen importlib._bootstrap>", line 967, in
> _find_and_load_unlocked
> File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
> File "<frozen importlib._bootstrap_external>", line 728, in exec_module
> File "<frozen importlib._bootstrap>", line 219, in
> _call_with_frames_removed
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/contrib/postgres/apps.py", line 8, in <module>
> from django.db.migrations.writer import MigrationWriter
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/db/migrations/writer.py", line 10, in <module>
> from django.db.migrations.loader import MigrationLoader
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/db/migrations/loader.py", line 8, in <module>
> from django.db.migrations.recorder import MigrationRecorder
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/db/migrations/recorder.py", line 9, in <module>
> class MigrationRecorder:
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/db/migrations/recorder.py", line 22, in MigrationRecorder
> class Migration(models.Model):
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/db/models/base.py", line 99, in __new__
> app_config = apps.get_containing_app_config(module)
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/apps/registry.py", line 252, in get_containing_app_config
> self.check_apps_ready()
> File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
> packages/django/apps/registry.py", line 135, in check_apps_ready
> raise AppRegistryNotReady("Apps aren't loaded yet.")
> django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
> }}}
>
> To reproduce (running python 3.7.2):
> Make a new python3 venv (python3 -m venv) and activate. Install django
> and psycopg2 using pip. Use django-admin.py startproject to get a fresh
> installation of django. Add contrib.postgres to INSTALLED_APPS. Run the
> command above, which should display the help messages. The same thing
> happens also with any other manage.py command.
New description:
After an upgrade to Django 2.2a1, I found the following problem:
{{{
$ python manage.py help
/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package
will be renamed from release 2.8; in order to keep installing from binary
please use "pip install psycopg2-binary" instead. For details see:
<http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
""")
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/core/management/__init__.py", line 381, in
execute_from_command_line
utility.execute()
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/core/management/__init__.py", line 357, in execute
django.setup()
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/apps/registry.py", line 91, in populate
app_config = AppConfig.create(entry)
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/apps/config.py", line 116, in create
mod = import_module(mod_path)
File "/usr/lib/python3.7/importlib/__init__.py", line 127, in
import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in
_find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/contrib/postgres/apps.py", line 8, in <module>
from django.db.migrations.writer import MigrationWriter
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/db/migrations/writer.py", line 10, in <module>
from django.db.migrations.loader import MigrationLoader
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/db/migrations/loader.py", line 8, in <module>
from django.db.migrations.recorder import MigrationRecorder
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/db/migrations/recorder.py", line 9, in <module>
class MigrationRecorder:
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/db/migrations/recorder.py", line 22, in MigrationRecorder
class Migration(models.Model):
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/db/models/base.py", line 99, in __new__
app_config = apps.get_containing_app_config(module)
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/apps/registry.py", line 252, in get_containing_app_config
self.check_apps_ready()
File "/home/test/.virtualenvs/testenv/lib/python3.7/site-
packages/django/apps/registry.py", line 135, in check_apps_ready
raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
}}}
To reproduce (running python 3.7.2):
Make a new python3 venv (python3 -m venv) and activate. Install django
2.2a1 and psycopg2 using pip. Use django-admin.py startproject to get a
fresh installation of django. Add contrib.postgres to INSTALLED_APPS. Run
the command above, which should display the help messages. The same thing
happens also with any other manage.py command.
Note: The same thing is working with no problem when running Django 2.1.5
--
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Ticket URL: <https://code.djangoproject.com/ticket/30111#comment:1>
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