Merge pull request #645 from gauthier-delacroix/Fix-namespaced-serializers-reloading

Fix namespaced serializers reloading

Author: steveklabnik

lib/active_model/serializable/utils.rb

@@ -4,8 +4,12 @@ module Utils
       extend self
 
       def _const_get(const)
-        method = RUBY_VERSION >= '2.0' ? :const_get : :qualified_const_get
-        Object.send method, const
+        begin
+          method = RUBY_VERSION >= '2.0' ? :const_get : :qualified_const_get
+          Object.send method, const
+        rescue NameError
+          const.safe_constantize
+        end
       end
     end
   end

lib/active_model/serializer.rb

@@ -63,11 +63,7 @@ def serializer_for(resource, options = {})
             ArraySerializer
           end
         else
-          begin
-            _const_get build_serializer_class(resource, options)
-          rescue NameError
-            nil
-          end
+          _const_get build_serializer_class(resource, options)
         end
       end