Merge pull request #1199 from yamila-moreno/get-filter-backends

Added get_filter_backends method

1 files changed, 18 insertions, 2 deletions

diff --git a/docs/api-guide/generic-views.md b/docs/api-guide/generic-views.md
index 9681c8c7..b9242724 100755
--- a/docs/api-guide/generic-views.md
+++ b/docs/api-guide/generic-views.md
@@ -121,6 +121,22 @@ For example:
 
 Note that if your API doesn't include any object level permissions, you may optionally exclude the ``self.check_object_permissions, and simply return the object from the `get_object_or_404` lookup.
 
+#### `get_filter_backends(self)`
+
+Returns the classes that should be used to filter the queryset. Defaults to returning the `filter_backends` attribute.
+
+May be override to provide more complex behavior with filters, as using different (or even exlusive) lists of filter_backends depending on different criteria.
+
+For example:
+
+    def get_filter_backends(self):
+        if "geo_route" in self.request.QUERY_PARAMS:
+            return (GeoRouteFilter, CategoryFilter)
+        elif "geo_point" in self.request.QUERY_PARAMS:
+            return (GeoPointFilter, CategoryFilter)
+
+        return (CategoryFilter,)
+
 #### `get_serializer_class(self)`
 
 Returns the class that should be used for the serializer.  Defaults to returning the `serializer_class` attribute, or dynamically generating a serializer class if the `model` shortcut is being used.
@@ -328,7 +344,7 @@ You can then simply apply this mixin to a view or viewset anytime you need to ap
         serializer_class = UserSerializer
         lookup_fields = ('account', 'username')
 
-Using custom mixins is a good option if you have custom behavior that needs to be used 
+Using custom mixins is a good option if you have custom behavior that needs to be used
 
 ## Creating custom base classes
 
@@ -337,7 +353,7 @@ If you are using a mixin across multiple views, you can take this a step further
     class BaseRetrieveView(MultipleFieldLookupMixin,
                            generics.RetrieveAPIView):
         pass
-    
+
     class BaseRetrieveUpdateDestroyView(MultipleFieldLookupMixin,
                                         generics.RetrieveUpdateDestroyAPIView):
         pass