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.

"""
max_users is a custom manage.py command.
It is intended to be called from a cron job to calculate the maximum
number of users online statistic.
"""
import datetime

from django.core.management.base import NoArgsCommand

from core.whos_online import max_users


class Command(NoArgsCommand):
    help = "Run periodically to compute the max users online statistic."

    def handle_noargs(self, **options):
        max_users()