title: Putting everything in the relationships model or adding a new model
body: <p>I followed the Michael Hartle book Rails Tutorial and made a user following system that works through a relationships table, with a <code>follower_id</code> and a <code>followed_id</code>.</p>
  
  <p>I want to add another relationship, this time a favoriting system. Would I be best to add the column to the relationships table and use that or should I create a new model to hold the favoriting relationship?</p>