Ryan, Thank you so much. The custom auth backend is the perfect solution. I feel silly now that I didn't think of that :) Very nice work. Hope I can pay you back someday.
Paul On Apr 20, 7:26 pm, Ryan Kelly <r...@rfk.id.au> wrote: > On Mon, 2009-04-20 at 15:17 -0700, Paul McLanahan wrote: > > I'm using a proxy model of django.contrib.auth.models.User to override > > __unicode__ and add some extra methods. This also means that I use my > > proxy model class in my ForeignKey and ManyToMany fields. This is all > > find and good until I need to use request.user and assign it to an > > instance of another of my models. Django tells me that I can't assign > > an instance of User where I need an instance of my proxy class. Right > > now I'm doing something I'm sure is very inefficient to get around > > this: > > > obj.author = ProxyUser.objects.get(pk=request.user.pk) > > You could assign the ID directly rather than assigning the object > instance: > > obj.author_id = request.user.id > > But if you then try to use the obj.author object in your code, it will > still perform an extra DB lookup. > > Another approach is to install a custom authentication backend that > returns instances of ProxyUser instead of User. This would ensure that > request.user is always an instance of your proxy class. I'm using a > backend like the following in a similar situation and it works great: > > class ProxyUserBackend(ModelBackend): > > def authenticate(self,username=None,password=None): > try: > user = ProxyUser.objects.get(username=username) > except ProxyUser.DoesNotExist: > user = None > if user is not None and user.check_password(password): > return user > return None > > def get_user(self,user_id): > try: > return ProxyUser.objects.get(pk=user_id) > except ProxyUser.DoesNotExist: > return None > > Cheers, > > Ryan > > -- > Ryan Kellyhttp://www.rfk.id.au | This message is digitally signed. Please > visit > r...@rfk.id.au | http://www.rfk.id.au/ramblings/gpg/for details > > signature.asc > < 1KViewDownload --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
