Django user get_all_permissions() is empty while user_permissions is set

django django-admin django-authentication django-permissions
Boris picture Boris · Jan 17, 2010 · Viewed 11.4k times · Source

I added some permissions to a user via the admin interface.

From some reason all the perm functions fail, e.g

>>> user.get_all_permissions()
set([])

But accessing the table directly, works:

>>> user.user_permissions.all()
(list of permissions as expected)

What can cause the "get_all_permissions" (and all the perm functions like has_perm()) to fail ?

Thanks

Answer

Mark Henwood picture Mark Henwood · May 3, 2010

had the same problem. I am guessing that at some point you have used a self-crafted AUTHENTICATION_BACKEND? Most examples on the net of this (INCLUDING THE DJANGO 1.0 DOCUMENTATION!) don't mention that the Backends are responsible for permissions handling as well.

However, no biggie: In whatever backend file your code resides, include this import:

from django.contrib.auth.backends import ModelBackend

Then make sure the Backend you wrote extends ModelBackend, e.g.:

class EmailBackend(ModelBackend):

Should be fine.

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