ActiveModel::Name must be used via extend, not include

Author: NDMarcel

lib/mongo_mapper/plugins/active_model.rb

@@ -4,13 +4,13 @@ module Plugins
     module ActiveModel
       extend ActiveSupport::Concern
 
-      include ::ActiveModel::Naming
       include ::ActiveModel::Conversion
       include ::ActiveModel::Serialization
       include ::ActiveModel::Serializers::Xml
       include ::ActiveModel::Serializers::JSON
 
       included do
+        extend ::ActiveModel::Naming
         extend ::ActiveModel::Translation
       end
     end