Update to rails 4.2

lib/qwaiter/serializer.rb

@@ -1,20 +1,24 @@
 module Qwaiter
   class Serializer < ActiveModel::Serializer
-    attribute :_id, key: :id
-    attributes :created_at, :updated_at
+    # attribute :_id, key: :id
+    attributes :id, :created_at, :updated_at
     # Bug in rails 4.1 serializing symbols in jsonify
     def to_json(*args)
       as_json.to_json(*args)
     end
+
+    def id
+      object._id
+    end
   end
 end
 
-require 'active_model/array_serializer'
-module ActiveModel
-  class ArraySerializer
-    # Bug in rails 4.1 serializing symbols in jsonify
-    def to_json(*args)
-      as_json.to_json(*args)
-    end
-  end
-end
+# require 'active_model/array_serializer'
+# module ActiveModel
+#   class ArraySerializer
+#     # Bug in rails 4.1 serializing symbols in jsonify
+#     def to_json(*args)
+#       as_json.to_json(*args)
+#     end
+#   end
+# end