Error: django.core.exceptions.appregistrynotready: apps aren't loaded yet - how to solve it?

Question

How to solve the problem - django.core.exceptions.appregistrynotready: apps aren't loaded yet.? I have the sample detail:

import os
 import sys
 
 path = '/Users/Peterhon/Desktop/dict/'
 if path not in sys.path:
  sys.path.append(path)
 
 os.chdir(path)
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dict.settings")
 
 import django
 django.setup()
 
 from django.core.wsgi import get_wsgi_application
 application = get_wsgi_application()

#!/usr/bin/env python
 import os
 import sys
 
 if __name__ == "__main__":
  os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dict.settings")
 
  from django.core.management import execute_from_command_line
 
  execute_from_command_line(sys.arg)

#!/usr/bin/env python
 import os
 import sys
 
 if __name__ == "__main__":
  os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dict.settings")
 
  from django.core.management import execute_from_command_line
 
  execute_from_command_line(sys.argv)

While I was running it, I found the warning message:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
  execute_from_command_line(sys.argv)
  File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 351, in execute_from_command_line
  utility.execute()
  File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 343, in execute
  self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 177, in fetch_command
  commands = get_commands()
  File "/usr/lib/python2.7/site-packages/django/utils/lru_cache.py", line 101, in wrapper
  result = user_function(*args, **kwds)
  File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 72, in get_commands
  for app_config in reversed(list(apps.get_app_configs())):
  File "/usr/lib/python2.7/site-packages/django/apps/registry.py", line 137, in get_app_configs
  self.check_apps_ready()
  File "/usr/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.

That is my question in my midterm exam, and it is urgent. I searched the solutions on some websites, but I didn't get it. I may miss any line or other changes. I appreciate your assistance!

hdtutoria · Accepted Answer

The cause: Your wsgi.py will be used by ./manage.py runserver, but it appears that the stack trace you provided at the beginning does not include the wsgi file. As a result, the error occurs before the wsgi file has been loaded. I'm wondering whether there's something wrong with your setup because you appear to be using the new style wsgi and you note that "the django version on the server is 1.8.5, and the local is 1.8.1". The solution: The following are the steps I recommend:

Rebuild your. Remove the env folder and reinstall pip install -r requirements.txt or something similar.
This is a frequent problem, so you should check out other StackOverflow questions

Adam Charles · Answer

This is what I encountered today. There was an app missing from INSTALLED_APPS. It was removed and the exception was resolved. Apps that aren't allowed to be imported will also trigger an AppRegistryNotReady exception.

This issue can also be caused by trying to import an app-level file into a project-level file. Celery Beat is an example of a project I am currently working on. I tried to define task schedules at app level using dictionaries. These were then imported into the celery.py file. Django threw an AppRegistryNotReady exception when I imported the dictionary from the app to the project. The exception can also be caused by importing items from other apps.

Samantha Gelbero · Answer

This is what I encountered today. There was an app missing from INSTALLED_APPS. It was removed and the exception was resolved. Apps that aren't allowed to be imported will also trigger an AppRegistryNotReady exception.

This is the bug history for this problem.

This issue can also be caused by trying to import an app-level file into a project-level file. Celery Beat is an example of a project I am currently working on. I tried to define task schedules at app level using dictionaries. These were then imported into the celery.py file. Django threw an AppRegistryNotReady exception when I imported the dictionary from the app to the project. The exception can also be caused by importing items from other apps.

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Error: django.core.exceptions.appregistrynotready: apps aren’t loaded yet – how to solve it?