title: Rails model design: copy a set of attributes from one class to another
body: <p>I have a Invite model, which has n + m attributes (location, timing etc.). When an invite is accepted, an Event object is created with n attributes copied from Invite model and k attributes of its own. I want to avoid duplication of n attributes.</p>
  
  <p>How should I model this relationship in Rails?</p>
  
  <p>Thank you.</p>