===============
django-guardian

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django-guardian is an implementation of per object permissions [1]_ on top
of Django’s authorization backend

Documentation

Online documentation is available at https://django-guardian.readthedocs.io/.

Requirements

• Python 3.8+
• A supported version of Django (currently 3.2+)

GitHub Actions run tests against Django versions 3.2, 4.1, 4.2, 5.0 and main.

Installation

To install django-guardian simply run::

pip install django-guardian

Configuration

We need to hook django-guardian into our project.

1. Put guardian into your INSTALLED_APPS at settings module:

… code:: python

INSTALLED_APPS = (
 ...
 'guardian',
)

2. Add extra authorization backend to your settings.py:

… code:: python

AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend', # default
    'guardian.backends.ObjectPermissionBackend',
)

3. 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:

… code:: python

  >>> from django.contrib.auth.models import User, Group
  >>> jack = User.objects.create_user('jack', '[email protected]', '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', 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:

… code:: python

>>> 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:

… code:: python

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)

… [1] Great paper about this feature is available at djangoadvent articles <https://github.com/djangoadvent/djangoadvent-articles/blob/master/1.2/06_object-permissions.rst>_.

… _Django: http://www.djangoproject.com/