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django middleware that disallows concurent user login while allowing such for administrators
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| from myapp.models import User, Visitor | |
| from django.contrib.sessions.models import Session | |
| class OneSessionPerUserMiddleware(object): | |
| """http://stackoverflow.com/a/1814797""" | |
| def process_request(self, request): | |
| if isinstance(request.user, User): | |
| current_key = request.session.session_key | |
| if hasattr(request.user, 'visitor'): | |
| active_key = request.user.visitor.session_key | |
| print active_key, current_key | |
| if active_key != current_key: | |
| Session.objects.filter(session_key=active_key).delete() | |
| request.user.visitor.session_key = current_key | |
| request.user.visitor.save() | |
| else: | |
| Visitor.objects.create( | |
| pupil=request.user, | |
| session_key=current_key, | |
| ) |
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| class Visitor(models.Model): | |
| pupil = models.OneToOneField(User, null=False) | |
| session_key = models.CharField(null=False, max_length=40) |
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Great snippet!
Since I needed this in my applications I created a django package (https://github.com/pcraston/django-preventconcurrentlogins) which is now on pypi (pip install django-preventconcurrentlogins).