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AttributeError: 'ObjectPermissionBackend' object has no attribute 'get_user'

See original GitHub issue

I am trying to use Django’s Client.force_login during tests, which appears to trigger an AttributeError when using ObjectPermissionBackend in settings.AUTHENTICATION_BACKENDS:

[25]   …/app/tests/test_middleware.py(23)test_ddt_middleware_normal()
-> response = client.get('/api/', HTTP_ACCEPT='text/html')
[26]   …/Vcs/django/django/test/client.py(531)get()
-> **extra)
[27]   …/Vcs/django/django/test/client.py(333)get()
-> return self.generic('GET', path, secure=secure, **r)
[28]   …/Vcs/django/django/test/client.py(409)generic()
-> return self.request(**r)
[29]   …/Vcs/django/django/test/client.py(478)request()
-> response = self.handler(environ)
[30]   …/Vcs/django/django/utils/six.py(686)reraise()
-> raise value
[31]   …/Vcs/django/django/core/handlers/exception.py(39)inner()
-> response = get_response(request)
[32]   …/app/middleware.py(37)__call__()
-> if not (request.user and
[33]   …/Vcs/django/django/utils/functional.py(234)inner()
-> self._setup()
[34]   …/Vcs/django/django/utils/functional.py(380)_setup()
-> self._wrapped = self._setupfunc()
[35]   …/Vcs/django/django/contrib/auth/middleware.py(24)<lambda>()
-> request.user = SimpleLazyObject(lambda: get_user(request))
[36]   …/Vcs/django/django/contrib/auth/middleware.py(12)get_user()
-> request._cached_user = auth.get_user(request)
[37] > …/Vcs/django/django/contrib/auth/__init__.py(187)get_user()
-> user = backend.get_user(user_id)

The pytest test looks like this:

def test_foobar(db, client, some_user, some_group):
    some_user.groups.add(some_group)
    some_user.save()
    client.force_login(some_user)

Setting a password and using login works:

def test_foobar(db, client, some_user, some_group):
    some_user.groups.add(some_group)
    some_user.set_password('password')
    some_user.save()
    assert client.login(username=some_user.username,
                        password='password')

According to the documentation the get_user method is required: https://docs.djangoproject.com/en/1.10/topics/auth/customizing/#writing-an-authentication-backend.

Issue Analytics

State:
Created 7 years ago
Comments:8 (5 by maintainers)

Top GitHub Comments

2reactions

orfcommented, Nov 28, 2016

I’ve made a ticket on the Django bug tracker: https://code.djangoproject.com/ticket/27542#ticket

PR #47 adds a note to the readme about this.

0reactions

blueyedcommented, Dec 2, 2016

Awesome, it got fixed in Django: https://github.com/django/django/commit/47744a0a4ed0b9e2d3f52de65abcf6cef9a14e31. Let’s close it here then.

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