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
22771	TestCase.client.logout fails when using custom authentication backend not based on AUTH_USER_MODEL	xafer	nobody	"Hello !

I'm not sure if it's a bug or a new feature:

TestCase.client.login calls django.contrib.auth.login(request, user)
which stores the user id and its backend in the request's session:
    request.session[SESSION_KEY] = user.pk
    request.session[BACKEND_SESSION_KEY] = user.backend

But in TestCase.client.logout calls, Django tries to get the authenticated user with:
    uid = self.session.get(SESSION_KEY)
    request.user = UserModel._default_manager.get(pk=uid)

assuming user is a AUTH_USER_MODEL and without checking its BACKEND_SESSION_KEY...

It would seem cleaner to actually rly on django.contrib.auth.get_user to find the correct user (whatever its type) and allow the concurrent use of multiple user models (typically user model and customer model...).

See https://github.com/xavfernandez/django_test_client_bugreport for a failing example."	Uncategorized	closed	Testing framework	1.6	Normal	fixed	logout test AUTH_USER_MODEL		Unreviewed	1	0	0	0	0	0