Implementation of per object permissions for Django 1.2 or later.
Project description
django-guardian is implementation of per object permissions [1] as authorization backend which is supported since Django 1.2. It won’t work with older Django releases.
Documentation
Online documentation is available at http://django-guardian.rtfd.org/.
Installation
To install django-guardian simply run:
pip install django-guardian
Configuration
We need to hook django-guardian into our project.
Put guardian into your INSTALLED_APPS at settings module:
INSTALLED_APPS = ( ... 'guardian', )
Add extra authorization backend to your settings.py:
AUTHENTICATION_BACKENDS = ( 'django.contrib.auth.backends.ModelBackend', # default 'guardian.backends.ObjectPermissionBackend', )Configure anonymous user ID in your settings.py:
ANONYMOUS_USER_ID = -1
Create guardian database tables by running:
python manage.py migrate
Usage
After installation and project hooks we can finally use object permissions with Django.
Lets start really quickly:
>>> from django.contrib.auth.models import User, Group
>>> jack = User.objects.create_user('jack', 'jack@example.com', 'topsecretagentjack')
>>> admins = Group.objects.create(name='admins')
>>> jack.has_perm('change_group', admins)
False
>>> from guardian.models import UserObjectPermission
>>> UserObjectPermission.objects.assign_perm('change_group', user=jack, obj=admins)
<UserObjectPermission: admins | jack | change_group>
>>> jack.has_perm('change_group', admins)
True
Of course our agent jack here would not be able to change_group globally:
>>> jack.has_perm('change_group')
False
Admin integration
Replace admin.ModelAdmin with GuardedModelAdmin for those models which should have object permissions support within admin panel.
For example:
from django.contrib import admin
from myapp.models import Author
from guardian.admin import GuardedModelAdmin
# Old way:
#class AuthorAdmin(admin.ModelAdmin):
# pass
# With object permissions support
class AuthorAdmin(GuardedModelAdmin):
pass
admin.site.register(Author, AuthorAdmin)
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