app/models/relationship.rb in your_platform-0.0.2 vs app/models/relationship.rb in your_platform-1.0.0

@@ -8,10 +8,10 @@
 #   is:  Brother     relationship.is       relationship.name
 #   of:  Sue         relationship.user2    relationship.of
 #
 class Relationship < ActiveRecord::Base
 
-  attr_accessible :user1, :user2, :name, :who, :is, :of, :who_by_title, :of_by_title
+  attr_accessible :user1, :user2, :name, :who, :is, :of, :who_by_title, :of_by_title if defined? attr_accessible
 
   belongs_to :user1, class_name: "User", inverse_of: :relationships_as_first_user
   belongs_to :user2, class_name: "User", inverse_of: :relationships_as_second_user
 
   # John is the brother of Sue.