brunosmartin / django-rest-serializer-field-permissions

Field-by-field serializer permissions for Django Rest Framework.

django-rest-serializer-field-permissions

Add field-by-field permission classes to your serializer fields that look like this:

  class PersonSerializer(FieldPermissionSerializerMixin, LookupModelSerializer):

      // Only allow authenticated users to retrieve family and given names
      family_names = serializers.CharField(permission_classes=(IsAuthenticated(), ))
      given_names = serializers.CharField(permission_classes=(IsAuthenticated(), ))
      
      // Allow all users to retrieve nick name
      nick_name = serializers.CharField(permission_classes=(AllowAll(), ))

Define your own permission classes as a function of any request variable.

Installation

Install the module in your Python distribution or virtualenv:

$ pip install django-rest-serializer-field-permissions

Add the application to your INSTALLED_APPS:

  INSTALLED_APPS = (
  ...
  "rest_framework_serializer_field_permissions",
  ...
  )

Use

In your serializers, mix FieldPermissionSerializerMixin into your serializer classes, as the left-most parent. The fields provided by rest_framework_serializer_field_permissions.fields accept permission_classes which operate in typical DRF fashion:

  from rest_framework import serializers
  
  from rest_framework_serializer_field_permissions import fields
  from rest_framework_serializer_field_permissions.serializers import FieldPermissionSerializerMixin
  from rest_framework_serializer_field_permissions.permissions import IsAuthenticated

  class PersonSerializer(FieldPermissionSerializerMixin, serializers.ModelSerializer):

      family_names = fields.CharField(permission_classes=(IsAuthenticated(), ))
      given_names = fields.CharField(permission_classes=(IsAuthenticated(), ))

Any pagination-capable viewset with which you wish to include permission-capable fields must use the ContextPassingPaginationSerializer provided by rest_framework_serializer_field_permissions.serializers.

  from rest_framework import viewsets
  
  from rest_framework_serializer_field_permissions.serializers import FieldPermissionSerializerMixin
  

  class MyViewset(viewsets.GenericViewSet):
      pagination_serializer_class = ContextPassingPaginationSerializer

The FieldPermissionSerializerMixin may be mixed with any DRF serializer class, not just ModelSerializer. Similarly, the ContextPassingPaginationSerializer may be used with any pagination-capable viewset, not just GenericViewSet.

You can write your own permission classes by sub-classing BaseFieldPermission in permissions.py.

How it Works

The FieldPermissionSerializerMixin provides its own fields property, which DRF serializers call to get a list of their own fields. The amended fields property checks for permission-bearing fields, forces them to check their permissions against the request, and scrubs from the return any fields which fail their permission checks.

Compatibility

• Django Rest Framework 3.0
• Django 1.6, 1.7, 1.8
• Python 2.7, 3.3, 3.4

See tox.ini for specific minor versions tested.

Additional Requirements

None

Todo

• Serializer tests
• Integration tests

Getting Involved

Feel free to open pull requests or issues. GitHub is the canonical location of this project.