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Description:

djangorestframeworkguardian2 0.6.0

django-rest-framework-guardian2

django-rest-framework-guardian2 provides django-guardian integrations for Django REST Framework.
Installation & Setup
To use django-rest-framework-guardian2, install it into your environment.
$ pip install djangorestframework-guardian2

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',
]

ObjectPermissionsFilter
The filter will ensure that querysets only returns objects for which the user has the appropriate view permission.
If you're using ObjectPermissionsFilter, 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 ObjectPermissionsFilter 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.ObjectPermissionsFilter]

ObjectPermissionsAssignmentMixin
A serializer mixin that allows permissions to be easily assigned to users and/or groups.
So each time an object is created or updated, the permissions_map returned by Serializer.get_permissions_map will be used to assign permission(s) to that object.
Please note that the existing permissions will remain intact.
A usage example might look like the following:
from rest_framework_guardian.serializers import ObjectPermissionsAssignmentMixin

from blog.models import Post

class PostSerializer(ObjectPermissionsAssignmentMixin, serializers.ModelSerializer):
class Meta:
model = Post
fields = '__all__'

def get_permissions_map(self, created):
current_user = self.context['request'].user
readers = Group.objects.get(name='readers')
supervisors = Group.objects.get(name='supervisors')

return {
'view_post': [current_user, readers],
'change_post': [current_user],
'delete_post': [current_user, supervisors]
}

Release Process

Update changelog
Update package version in setup.cfg
Create git tag for version
Build & upload release to PyPI
$ rm -rf dist/ build/
$ pip install -U build twine
$ python -m build
$ twine upload -r test dist/*
$ twine upload dist/*

License
See: LICENSE
BSD 3-Clause License
Copyright (c) 2018, Ryan P Kilby
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.

Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.