A periodic task for removing expired Django sessions from the django_session table

For projects that use the cached_db or db session engines, the django_session table can get quite large after a while.

Django provides the 'cleanup' management command for deleting expired sessions from this table but you have to either run this command manually or set-up a cron job.

Django Session Cleanup provides a periodic task for Celery that will delete expired sessions on a weekly basis.

1. Run pip install django-session-cleanup or place session_cleanup on your Python path.

2. Add session_cleanup to your list of INSTALLED_APPS.

3. Add an entry to, or create a CELERYBEAT_SCHEDULE in your project's settings:

   from session_cleanup.settings import weekly_schedule
   CELERYBEAT_SCHEDULE = {
       ...
       'session_cleanup': weekly_schedule
   }