id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
11560	let proxy models multiple-inherit from the same concrete base model	Ryan Kelly	Akshesh Doshi	"Currently proxy models are required to have a single concrete base model class.  Unfortunately this prevents me from combining several proxy subclasses of the same model.  In my particular use case, I have two different apps that provide two different proxies of the standard User model.  To successfully use both apps I need to create another subclass that combines the two, e.g:

{{{
class MyUser(App1User,App2User):
    class Meta:
        proxy = True
}}}

This gives a TypeError: ""Proxy model 'MyUser' has more than one non-abstract model base class"".  But since App1User and App2User proxy the same underlying model, there's no ambiguity introduced by this multiple inheritance and I think it should be permitted.

Attached is a simple patch to make this work, by permitting additional concrete base classes if they are identical to the one that was already found.

"	New feature	closed	Database layer (models, ORM)	dev	Normal	fixed			Accepted	1	0	0	1	0	0