Django How to prevent multiple users login using the same credentials

Question

I am developing an Django application using django auth module and would like to prevent multiple login using the same user name and password.

It should prevent mult

Answer 1

You may try this, it logs out the first user and logs in the second. Add middleware.py in your app directory (same level as models, views etc) and add this code. Useful when the same person is using more than one device. Make sure you add this to your middleware classes: 'myapp.middleware.UserRestrict',

class UserRestrict(object):
    def process_request(self, request):
        """
        Checks if different session exists for user and deletes it.
        """
        if request.user.is_authenticated():
            cache = get_cache('default')
            cache_timeout = 86400
            cache_key = "user_pk_%s_restrict" % request.user.pk
            cache_value = cache.get(cache_key)

            if cache_value is not None:
                if request.session.session_key != cache_value:
                    engine = import_module(settings.SESSION_ENGINE)
                    session = engine.SessionStore(session_key=cache_value)
                    session.delete()
                    cache.set(cache_key, request.session.session_key, 
                              cache_timeout)
            else:
                cache.set(cache_key, request.session.session_key, cache_timeout)