Set many explicitly from mixins. Refs #564.

rest_framework/generics.py

@@ -48,7 +48,7 @@ class GenericAPIView(views.APIView):
         return serializer_class
 
     def get_serializer(self, instance=None, data=None,
-                       files=None, partial=False):
+                       files=None, partial=False, many=False):
         """
         Return the serializer instance that should be used for validating and
         deserializing input, and for serializing output.
@@ -56,7 +56,7 @@ class GenericAPIView(views.APIView):
         serializer_class = self.get_serializer_class()
         context = self.get_serializer_context()
         return serializer_class(instance, data=data, files=files,
-                                partial=partial, context=context)
+                                many=many, partial=partial, context=context)
 
 
 class MultipleObjectAPIView(MultipleObjectMixin, GenericAPIView):

rest_framework/mixins.py

@@ -65,7 +65,7 @@ class ListModelMixin(object):
             paginator, page, queryset, is_paginated = packed
             serializer = self.get_pagination_serializer(page)
         else:
-            serializer = self.get_serializer(self.object_list)
+            serializer = self.get_serializer(self.object_list, many=True)
 
         return Response(serializer.data)