related manager does not limit correctly on a proxy model

[Shaun Cutts]

If I have a proxy of a model, the related manager does not correctly limit related items.

E.g.

class Profile( models.Model ):

 # ...

class Location( models.Model ):
    home_of = models.ForeignKey( Profile, related_name= 'locations' )

class ProxyProfile( Profile ):
    class Meta:
        proxy = True

Now if I have a particular Profile p with one location, its related manager
will give me the correct number of objects, but not when accessed via the proxy:

>>> Location.objects.count()
1000
>>> p = Profile.objects.get( pk = 1234 )
>>> p.locations.count()
1
>>> pp = ProxyProfile.objects.get( pk = 1234 )
>>> pp.locations.count()
1000

[Shaun Cutts]

Opps... this is actually a manifestation of #10808

(Not mentioned in description is that example "Profile" object actually has two base classes.)

Closing ....