Add RetrieveDestroyAPIView and remove Metadata mixin

docs/api-guide/generic-views.md

@@ -47,9 +47,11 @@ For very simple cases you might want to pass through any class attributes using
 
 # API Reference
 
+The following classes are the concrete generic views.  If you're using generic views this is normally the level you'll be working at unless you need heavily customized behavior.
+
 ## ListAPIView
 
-Used for read-only endpoints to represent a collection of model instances.
+Used for **read-only** endpoints to represent a **collection of model instances**.
 
 Provides a `get` method handler.
 
@@ -57,7 +59,7 @@ Extends: [MultipleObjectBaseAPIView], [ListModelMixin]
 
 ## ListCreateAPIView
 
-Used for read-write endpoints to represent a collection of model instances.
+Used for **read-write** endpoints to represent a **collection of model instances**.
 
 Provides `get` and `post` method handlers.
 
@@ -65,15 +67,23 @@ Extends: [MultipleObjectBaseAPIView], [ListModelMixin], [CreateModelMixin]
 
 ## RetrieveAPIView
 
-Used for read-only endpoints to represent a single model instance.
+Used for **read-only** endpoints to represent a **single model instance**.
 
 Provides a `get` method handler.
 
 Extends: [SingleObjectBaseAPIView], [RetrieveModelMixin]
 
+## RetrieveDestroyAPIView
+
+Used for **read or delete** endpoints to represent a **single model instance**.
+
+Provides `get` and `delete` method handlers.
+
+Extends: [SingleObjectBaseAPIView], [RetrieveModelMixin], [DestroyModelMixin]
+
 ## RetrieveUpdateDestroyAPIView
 
-Used for read-write endpoints to represent a single model instance.
+Used for **read-write** endpoints to represent a **single model instance**.
 
 Provides `get`, `put` and `delete` method handlers.
 
@@ -111,28 +121,39 @@ The mixin classes provide the actions that are used to provide the basic view be
 
 Provides a `.list(request, *args, **kwargs)` method, that implements listing a queryset.
 
+Should be mixed in with [MultipleObjectBaseAPIView].
+
 ## CreateModelMixin
 
 Provides a `.create(request, *args, **kwargs)` method, that implements creating and saving a new model instance.
 
+Should be mixed in with any [BaseAPIView].
+
 ## RetrieveModelMixin
 
 Provides a `.retrieve(request, *args, **kwargs)` method, that implements returning an existing model instance in a response.
 
+Should be mixed in with [SingleObjectBaseAPIView].
+
 ## UpdateModelMixin
 
 Provides a `.update(request, *args, **kwargs)` method, that implements updating and saving an existing model instance.
 
+Should be mixed in with [SingleObjectBaseAPIView].
+
 ## DestroyModelMixin
 
 Provides a `.destroy(request, *args, **kwargs)` method, that implements deletion of an existing model instance.
 
+Should be mixed in with [SingleObjectBaseAPIView].
+
 [cite]: https://docs.djangoproject.com/en/dev/ref/class-based-views/#base-vs-generic-views
 [MultipleObjectMixin]: https://docs.djangoproject.com/en/dev/ref/class-based-views/mixins-multiple-object/
 [SingleObjectMixin]: https://docs.djangoproject.com/en/dev/ref/class-based-views/mixins-single-object/
 [multiple-object-mixin-classy]: http://ccbv.co.uk/projects/Django/1.4/django.views.generic.list/MultipleObjectMixin/
 [single-object-mixin-classy]: http://ccbv.co.uk/projects/Django/1.4/django.views.generic.detail/SingleObjectMixin/
 
+[BaseAPIView]: #baseapiview
 [SingleObjectBaseAPIView]: #singleobjectbaseapiview
 [MultipleObjectBaseAPIView]: #multipleobjectbaseapiview
 [ListModelMixin]: #listmodelmixin

rest_framework/generics.py

@@ -96,7 +96,6 @@ class SingleObjectBaseView(SingleObjectMixin, BaseView):
 ### by composing the mixin classes with a base view.   ###
 
 class ListAPIView(mixins.ListModelMixin,
-                  mixins.MetadataMixin,
                   MultipleObjectBaseView):
     """
     Concrete view for listing a queryset.
@@ -104,13 +103,9 @@ class ListAPIView(mixins.ListModelMixin,
     def get(self, request, *args, **kwargs):
         return self.list(request, *args, **kwargs)
 
-    def options(self, request, *args, **kwargs):
-        return self.metadata(request, *args, **kwargs)
-
 
 class ListCreateAPIView(mixins.ListModelMixin,
                         mixins.CreateModelMixin,
-                        mixins.MetadataMixin,
                         MultipleObjectBaseView):
     """
     Concrete view for listing a queryset or creating a model instance.
@@ -121,12 +116,8 @@ class ListCreateAPIView(mixins.ListModelMixin,
     def post(self, request, *args, **kwargs):
         return self.create(request, *args, **kwargs)
 
-    def options(self, request, *args, **kwargs):
-        return self.metadata(request, *args, **kwargs)
-
 
 class RetrieveAPIView(mixins.RetrieveModelMixin,
-                      mixins.MetadataMixin,
                       SingleObjectBaseView):
     """
     Concrete view for retrieving a model instance.
@@ -134,14 +125,23 @@ class RetrieveAPIView(mixins.RetrieveModelMixin,
     def get(self, request, *args, **kwargs):
         return self.retrieve(request, *args, **kwargs)
 
-    def options(self, request, *args, **kwargs):
-        return self.metadata(request, *args, **kwargs)
+
+class RetrieveDestroyAPIView(mixins.RetrieveModelMixin,
+                             mixins.DestroyModelMixin,
+                             SingleObjectBaseView):
+    """
+    Concrete view for retrieving or deleting a model instance.
+    """
+    def get(self, request, *args, **kwargs):
+        return self.retrieve(request, *args, **kwargs)
+
+    def delete(self, request, *args, **kwargs):
+        return self.destroy(request, *args, **kwargs)
 
 
 class RetrieveUpdateDestroyAPIView(mixins.RetrieveModelMixin,
                                    mixins.UpdateModelMixin,
                                    mixins.DestroyModelMixin,
-                                   mixins.MetadataMixin,
                                    SingleObjectBaseView):
     """
     Concrete view for retrieving, updating or deleting a model instance.
@@ -154,6 +154,3 @@ class RetrieveUpdateDestroyAPIView(mixins.RetrieveModelMixin,
 
     def delete(self, request, *args, **kwargs):
         return self.destroy(request, *args, **kwargs)
-
-    def options(self, request, *args, **kwargs):
-        return self.metadata(request, *args, **kwargs)

rest_framework/mixins.py

@@ -112,28 +112,3 @@ class DestroyModelMixin(object):
         self.object = self.get_object()
         self.object.delete()
         return Response(status=status.HTTP_204_NO_CONTENT)
-
-
-# TODO: Remove MetadataMixin, and implement on APIView.options()
-class MetadataMixin(object):
-    """
-    Return a dicitonary of view metadata.
-    Should be mixed in with any `BaseView`.
-
-    This mixin is typically used for the HTTP 'OPTIONS' method.
-    """
-    def metadata(self, request, *args, **kwargs):
-        content = {
-            'name': self.get_name(),
-            'description': self.get_description(),
-            'renders': [renderer.media_type for renderer in self.renderer_classes],
-            'parses': [parser.media_type for parser in self.parser_classes],
-        }
-        #  TODO: Add 'fields', from serializer info.
-        # serializer = self.get_serializer()
-        # if serializer is not None:
-        #     field_name_types = {}
-        #     for name, field in form.fields.iteritems():
-        #         field_name_types[name] = field.__class__.__name__
-        #     content['fields'] = field_name_types
-        return Response(content, status=status.HTTP_200_OK)

rest_framework/views.py

@@ -124,6 +124,21 @@ class APIView(View):
             description = escape(description).replace('\n', '<br />')
         return mark_safe(description)
 
+    def metadata(self, request):
+        return {
+            'name': self.get_name(),
+            'description': self.get_description(),
+            'renders': [renderer.media_type for renderer in self.renderer_classes],
+            'parses': [parser.media_type for parser in self.parser_classes],
+        }
+        #  TODO: Add 'fields', from serializer info, if it exists.
+        # serializer = self.get_serializer()
+        # if serializer is not None:
+        #     field_name_types = {}
+        #     for name, field in form.fields.iteritems():
+        #         field_name_types[name] = field.__class__.__name__
+        #     content['fields'] = field_name_types
+
     def http_method_not_allowed(self, request, *args, **kwargs):
         """
         Called if `request.method` does not corrospond to a handler method.
@@ -309,3 +324,11 @@ class APIView(View):
 
         self.response = self.finalize_response(request, response, *args, **kwargs)
         return self.response
+
+    def options(self, request, *args, **kwargs):
+        """
+        Handler method for HTTP 'OPTIONS' request.
+        We may as well implement this as Django will otherwise provide
+        a less useful default implementation.
+        """
+        return Response(self.metadata(request), status=status.HTTP_200_OK)