Construct view in schema generator with respect of overrides

rest_framework/schemas.py

@@ -86,9 +86,10 @@ class SchemaGenerator(object):
             endpoints = []
             for key, link, callback in self.endpoints:
                 method = link.action.upper()
-                view = callback.cls()
+                view = self.get_view(callback)
                 view.request = clone_request(request, method)
                 view.format_kwarg = None
+
                 try:
                     view.check_permissions(view.request)
                 except exceptions.APIException:
@@ -135,6 +136,15 @@ class SchemaGenerator(object):
 
         return api_endpoints
 
+    def get_view(self, callback):
+        """
+        Return constructed view with respect of overrided attributes by detail_route and list_route
+        """
+        view = callback.cls()
+        for attr, val in getattr(callback, 'initkwargs', {}).iteritems():
+            setattr(view, attr, val)
+        return view
+
     def get_path(self, path_regex):
         """
         Given a URL conf regex, return a URI template string.
@@ -165,9 +175,10 @@ class SchemaGenerator(object):
         if hasattr(callback, 'actions'):
             return [method.upper() for method in callback.actions.keys()]
 
+        view = self.get_view(callback)
         return [
             method for method in
-            callback.cls().allowed_methods if method not in ('OPTIONS', 'HEAD')
+            view.allowed_methods if method not in ('OPTIONS', 'HEAD')
         ]
 
     def get_key(self, path, method, callback):
@@ -194,9 +205,7 @@ class SchemaGenerator(object):
         """
         Return a `coreapi.Link` instance for the given endpoint.
         """
-        view = callback.cls()
-        for attr, val in getattr(callback, 'initkwargs', {}).items():
-            setattr(view, attr, val)
+        view = self.get_view(callback)
 
         fields = self.get_path_fields(path, method, callback, view)
         fields += self.get_serializer_fields(path, method, callback, view)

tests/test_schemas.py

@@ -33,15 +33,25 @@ class AnotherSerializer(serializers.Serializer):
     d = serializers.CharField(required=False)
 
 
+class ForbidAll(permissions.BasePermission):
+    def has_permission(self, request, view):
+        return False
+
+
 class ExampleViewSet(ModelViewSet):
     pagination_class = ExamplePagination
     permission_classes = [permissions.IsAuthenticatedOrReadOnly]
     filter_backends = [filters.OrderingFilter]
     serializer_class = ExampleSerializer
 
-    @detail_route(methods=['post'], serializer_class=AnotherSerializer)
+    @detail_route(methods=['put', 'post'],
+                  serializer_class=AnotherSerializer)
     def custom_action(self, request, pk):
-        return super(ExampleSerializer, self).retrieve(self, request)
+        return super(ExampleSerializer, self).update(self, request)
+
+    @detail_route(permission_classes=[ForbidAll])
+    def forbidden_action(self, request, pk):
+        return super(ExampleSerializer, self).update(self, request)
 
 
 class ExampleView(APIView):
@@ -130,6 +140,16 @@ class TestRouterGeneratedSchema(TestCase):
                             coreapi.Field('pk', required=True, location='path')
                         ]
                     ),
+                    'custom_action': coreapi.Link(
+                        url='/example/{pk}/custom_action/',
+                        action='put',
+                        encoding='application/json',
+                        fields=[
+                            coreapi.Field('pk', required=True, location='path'),
+                            coreapi.Field('c', required=True, location='form'),
+                            coreapi.Field('d', required=False, location='form'),
+                        ]
+                    ),
                     'custom_action': coreapi.Link(
                         url='/example/{pk}/custom_action/',
                         action='post',