I'm upgrading a Django site to 3.1.2 and noticed one backend app wasn't working, in the process of asking the community help in fixing this I found out the app wasn't a custom made code by a single coder for the site but a community project called django-import-export. Since it's up to date and supports django 3.1 i deleted the manual way it was setup as a folder and pip installed it. i then tried to do a makemigrations threw an error and after reading the setup docs assumed possibly you need to do collectstatic first, it also threw the same error
(kpsga) sammy@kpsga:~/webapps/kpsga$ python manage.py collectstatic
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/core/management/__init__.py", line 377, in execute
django.setup()
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/apps/registry.py", line 114, in populate
app_config.import_models()
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/apps/config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/sammy/webapps/kpsga/guides/models.py", line 77, in <module>
class GuideResource(resources.ModelResource):
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/import_export/resources.py", line 930, in __new__
field = new_class.field_from_django_field(f.name, f,
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/import_export/resources.py", line 1079, in field_from_django_field
FieldWidget = cls.widget_from_django_field(django_field)
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/import_export/resources.py", line 1045, in widget_from_django_field
result = getattr(cls, result)(f)
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/import_export/resources.py", line 1025, in get_fk_widget
model=get_related_model(field))
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/import_export/resources.py", line 49, in get_related_model
if hasattr(field, 'related_model'):
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/utils/functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/db/models/fields/related.py", line 95, in related_model
apps.check_models_ready()
File "/home/sammy/webapps/envs/kpsga/lib/python3.8/site-packages/django/apps/registry.py", line 141, in check_models_ready
raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.
this somehow is related to installed_apps so I've included the entire list below
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
#site apps
'guides',
'pages',
#imported old dependencies
'blog',
'import_export',
'generic',
#imports
'comments_moderation',
'django_comments',
'sorl.thumbnail',
#additional django
'django.contrib.sites',
'django.contrib.humanize',
]
The traceback shows that the error occurs when loading GuideResource in your models.py.
The getting started docs for django-import-export suggest putting the resource in the admin.py, so I would try moving the GuideResource outside of models.py.