title: ruby copy a paperclip attachment from one model to another?
body: <p>I have two models like this:-  </p>
  
  <p>Model 1 - card - contains a representation of data of interest for front page<br>
   attachment name = cardimage<br>
  Model 2 - user - contains the user<br>
   attachment name = avatar  </p>
  
  <p>When I create! a new card, I want the avatar from the user model to be copied to the card   model as a new cardimage.  </p>
  
  <p>Is there a simple one liner for this?</p>
  
  <p>Ruby/Rails/Paperclip  </p>