Add missing decorator: content_negotiation

rest_framework/decorators.py

@@ -70,6 +70,9 @@ def api_view(http_method_names=None):
         WrappedAPIView.permission_classes = getattr(func, 'permission_classes',
                                                     APIView.permission_classes)
 
+        WrappedAPIView.content_negotiation_class = getattr(func, 'content_negotiation_class',
+                                                           APIView.content_negotiation_class)
+
         WrappedAPIView.metadata_class = getattr(func, 'metadata_class',
                                                 APIView.metadata_class)
 
@@ -119,6 +122,13 @@ def permission_classes(permission_classes):
     return decorator
 
 
+def content_negotiation_class(content_negotiation_class):
+    def decorator(func):
+        func.content_negotiation_class = content_negotiation_class
+        return func
+    return decorator
+
+
 def metadata_class(metadata_class):
     def decorator(func):
         func.metadata_class = metadata_class

tests/test_decorators.py

@@ -6,10 +6,11 @@ from django.test import TestCase
 from rest_framework import status
 from rest_framework.authentication import BasicAuthentication
 from rest_framework.decorators import (
-    action, api_view, authentication_classes, metadata_class, parser_classes,
-    permission_classes, renderer_classes, schema, throttle_classes,
-    versioning_class
+    action, api_view, authentication_classes, content_negotiation_class,
+    metadata_class, parser_classes, permission_classes, renderer_classes,
+    schema, throttle_classes, versioning_class
 )
+from rest_framework.negotiation import BaseContentNegotiation
 from rest_framework.parsers import JSONParser
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.renderers import JSONRenderer
@@ -174,6 +175,21 @@ class DecoratorTestCase(TestCase):
         assert response.status_code == status.HTTP_405_METHOD_NOT_ALLOWED
         assert response.data == {'detail': 'Method "OPTIONS" not allowed.'}
 
+    def test_content_negotiation(self):
+        class CustomContentNegotiation(BaseContentNegotiation):
+            def select_renderer(self, request, renderers, format_suffix):
+                assert request.META['HTTP_ACCEPT'] == 'custom/type'
+                return (renderers[0], renderers[0].media_type)
+
+        @api_view(["GET"])
+        @content_negotiation_class(CustomContentNegotiation)
+        def view(request):
+            return Response({})
+
+        request = self.factory.get('/', HTTP_ACCEPT='custom/type')
+        response = view(request)
+        assert response.status_code == status.HTTP_200_OK
+
     def test_schema(self):
         """
         Checks CustomSchema class is set on view