django-rest-framework-guardian

django-rest-framework-guardian provides django-guardian integrations for Django REST Framework. Currently, this is only includes the DjangoObjectPermissionsFilter.

Installation & Setup

To use django-rest-framework-guardian, install it into your environment.

$ pip install djangorestframework-guardian

Ensure both Django REST Framework and django-guardian are configured and added to your INSTALLED_APPS setting.

INSTALLED_APPS = [
    'rest_framework',
    'guardian',
]

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

DjangoObjectPermissionsFilter

The filter will ensure that querysets only returns objects for which the user has the appropriate view permission.

If you're using DjangoObjectPermissionsFilter, you'll probably also want to add an appropriate object permissions class, to ensure that users can only operate on instances if they have the appropriate object permissions. The easiest way to do this is to subclass DjangoObjectPermissions and add 'view' permissions to the perms_map attribute.

An example using both DjangoObjectPermissionsFilter and DjangoObjectPermissions might look like the following:

permissions.py:

from rest_framework import permissions


class CustomObjectPermissions(permissions.DjangoObjectPermissions):
    """
    Similar to `DjangoObjectPermissions`, but adding 'view' permissions.
    """
    perms_map = {
        'GET': ['%(app_label)s.view_%(model_name)s'],
        'OPTIONS': ['%(app_label)s.view_%(model_name)s'],
        'HEAD': ['%(app_label)s.view_%(model_name)s'],
        'POST': ['%(app_label)s.add_%(model_name)s'],
        'PUT': ['%(app_label)s.change_%(model_name)s'],
        'PATCH': ['%(app_label)s.change_%(model_name)s'],
        'DELETE': ['%(app_label)s.delete_%(model_name)s'],
    }

views.py:

from rest_framework import viewsets
from rest_framework_guardian import filters

from myapp.models import Event
from myapp.permissions import CustomObjectPermissions
from myapp.serializers import EventSerializer


class EventViewSet(viewsets.ModelViewSet):
    """
    Viewset that only lists events if user has 'view' permissions, and only
    allows operations on individual events if user has appropriate 'view', 'add',
    'change' or 'delete' permissions.
    """
    queryset = Event.objects.all()
    serializer_class = EventSerializer
    permission_classes = (CustomObjectPermissions,)
    filter_backends = (filters.DjangoObjectPermissionsFilter,)

For more information on adding 'view' permissions for models, see the relevant section of the django-guardian documentation, and this blogpost.

Release Process

• Update changelog
• Update package version in setup.py
• Create git tag for version
• Build & upload release to PyPI

  $ pip install -U pip setuptools wheel twine
  $ rm -rf dist/ build/
  $ python setup.py bdist_wheel
  $ twine upload dist/*