Second-level proxy fails to inherit reverse relation from parent proxy

[Shai Berger]

Double proxy models are, as has been noted before, a questionable design decision, but they should still work (the reason here: we need more than one Admin interface for the parent proxy class). We have, basically, this:

class A(models.Model):
    pass

class B(A):
    class Meta:
        proxy=True

class F(models.Model):
    b = models.ForeignKey(B, related_name="bffs")

class C(B):
    class Meta:
        proxy=True

and when we try

    qset = C.objects.filter(bffs__in=whatever)

we get "bffs not recognized, options are ..."

Not sure if this still happens with master, will try to repro later.

[Simon Charette]

This should be fixed by 5b980897f2da3c048d88029af554e0fc4be68a8e in 1.10 and master.

[Simon Charette]

I confirmed this was fixed in Django 1.10.