--- a/config/initializers/wrap_parameters.rb	Tue Mar 01 16:36:10 2016 +0900
+++ b/config/initializers/wrap_parameters.rb	Fri May 13 03:56:07 2016 +0900
@@ -1,5 +1,5 @@
 # Be sure to restart your server when you modify this file.
-#
+
 # This file contains settings for ActionController::ParamsWrapper which
 # is enabled by default.
 
@@ -8,7 +8,7 @@
   wrap_parameters :format => [:json]
 end
 
-# Disable root element in JSON by default.
-ActiveSupport.on_load(:active_record) do
-  self.include_root_in_json = false
-end
+# To enable root element in JSON for ActiveRecord objects.
+# ActiveSupport.on_load(:active_record) do
+#   self.include_root_in_json = true
+# end