#20218: Default authorization backend returns False when queried for object level permissions ------------------------------+------------------------------------ Reporter: soren@… | Owner: nobody Type: Bug | Status: new Component: contrib.auth | Version: 1.5 Severity: Normal | Resolution: Keywords: auth | Triage Stage: Accepted Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 ------------------------------+------------------------------------
Comment (by Jamie Bliss): Replying to [ticket:20218 soren@…]: > Ticket #12462 suggests this is intentional, but doesn't give much of a rationale. It seems to me that if you don't want a user to be able to edit all objects of type XXX, don't give them the "app.change_XXX"? I think the rationale is that the current behavior handles the general permissions case (no object) while still falling through and allowing another provider to handle the object-specific case. The snippet to I used to work around this. {{{#!python class UseGeneralPermissions: """ Permissions provider that does object-level permissions by using general permissions. """ def has_perm(self, user_obj, perm, obj=None): if obj is None: return False else: # Retry using general permissions return user_obj.has_perm(perm) }}} As to how general and object-level permissions interact? That is completely unspecified, and there isn't a clear answer how it should be. 1. A general given overrides an object-level ungiven, 2. A general ungiven overrides an object-level given. 1 still allows efficient bulk operations but UIs must check permissions on each object to know to display actions. 2 allows UIs to display actions optimistically, but can prevent efficient bulk operations. -- Ticket URL: <https://code.djangoproject.com/ticket/20218#comment:7> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/075.88cf34baf4263d7f0def9db42e3da37a%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.