Wiki integration. Requests don't always have sessions. In particular this occurs when a request is made without a trailing slash. The Common middleware redirects when this happens, and the middleware process_request() processing stops before a session can get added. So just set an attribute on the request object for each operation. This seemed weird to me at first, but there are plenty of examples of this in the Django code base already.

"""
Celery tasks for the messages application.

"""
from celery.task import task


@task
def purge_messages():
    """
    Task to purge messages that have been deleted by both sender & receiver.

    """
    from messages.management.commands.purge_messages import Command

    command = Command()
    command.execute()