ModuleNotFoundError: No module named 'django_admin_multi_select_filter' when using postgres SQL_ENGINE

[alexandrumd]

Hi,

When trying to use django_admin_multi_select_filter in a postgres SQL_ENGINE scenario it fails with

from django_admin_multi_select_filter.filters import MultiSelectFieldListFilter
ModuleNotFoundError: No module named 'django_admin_multi_select_filter'

On local it works as expected.

I am using it like this

from django.contrib import admin
from django_admin_multi_select_filter.filters import MultiSelectFieldListFilter
....
@admin.register(Project)
class ProjectAdmin(DefaultFilterMixin, admin.ModelAdmin):
....
  list_filter = ('xxx', 'yyy', 'zzz',
                   ('project_topics', MultiSelectFieldListFilter),
    )
...

Any ideas what might cause the error and what i could troubleshoot for the SQL_ENGINE difference? Other than this there is no other difference compared to the local setup.

Thank you!

[JobDoesburg]

Hi Alex,

This actually sounds like you simply haven't installed the package properly on your production machine. If you're sure it is installed, please let me know because then this is quite a weird bug in fact.

[alexandrumd]

Thanks for the quick answer!

Let me share a bit more details about the production and local setup. So on local i just do

pip3 install -r requirements.txt

in a virtual python environment with requirements.txt having

django-admin-multi-select-filter==1.2.1

On prod i build a container, and the Dockerfile installs the requirements like

RUN pip3 install --upgrade pip && pip3 install --no-cache-dir -r requirements.txt

So it's installing the same ones and i can see it's installed in the docker build logs:

#13 9.269 Collecting django-admin-multi-select-filter==1.2.1 (from -r requirements.txt (line 12))
#13 9.274   Downloading django_admin_multi_select_filter-1.2.1-py3-none-any.whl (4.8 kB)
...
#13 14.65   Installing build dependencies: started
...
#13 20.10   Getting requirements to build wheel: finished with status 'done'

Then it fails with the error mentioned when i run the tests or migrations, part of the deployment pipeline, like for example:

python3 manage.py test
# or
python3 manage.py migrate

Full error logs are below:

Traceback (most recent call last):
--
File "/usr/src/app/manage.py", line 21, in <module>
main()
File "/usr/src/app/manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/home/flynest/.local/lib/python3.11/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
utility.execute()
File "/home/flynest/.local/lib/python3.11/site-packages/django/core/management/__init__.py", line 395, in execute
django.setup()
File "/home/flynest/.local/lib/python3.11/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/flynest/.local/lib/python3.11/site-packages/django/apps/registry.py", line 122, in populate
app_config.ready()
File "/home/flynest/.local/lib/python3.11/site-packages/django/contrib/admin/apps.py", line 27, in ready
self.module.autodiscover()
File "/home/flynest/.local/lib/python3.11/site-packages/django/contrib/admin/__init__.py", line 24, in autodiscover
autodiscover_modules('admin', register_to=site)
File "/home/flynest/.local/lib/python3.11/site-packages/django/utils/module_loading.py", line 47, in autodiscover_modules
import_module('%s.%s' % (app_config.name, module_to_search))
File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/usr/src/app/gitlab/admin.py", line 4, in <module>
from django_admin_multi_select_filter.filters import MultiSelectFieldListFilter
ModuleNotFoundError: No module named 'django_admin_multi_select_filter'

I see it mentions something about apps.populate(settings.INSTALLED_APPS) but i saw in the docs it's not needed to be added to settings 🤷

P.S. i've also tried with a docker-compose setup on local, with postgres as well, and it works - which is even more puzzling.

Thanks!

[JobDoesburg]

Hmmm...

To start with, at least I am sure it doesn't need to be added to your INSTALLED_APPS because it's not truly a Django app: it doesn't have any admin, models or AppConfig that need to be loaded.

I cannot reproduce your error myself to be fair. Maybe your pythonn3 manage.py test or migrate don't actually use the virtual python env that you installed the module in. I'm sorry, but all I can say is that for me, the module installs perfectly fine to any virtual environment I create...

[alexandrumd]

Indeed it was something caused by the build process in the CI. The library was not yet installed on the container at the specific stage when i was running the django management commands.
Thanks for the assistance!