title: show first record in array on index.html.erb
body: <p>I have an Image model that is linked by a many-to-one relationship with the Post model.</p>
  
  <p>On the index action I would like to display only the first image.  <code>@post.images.each</code> works well but <code>@post.image.first</code> does not.  So what I am wondering is: while in the view how does one display only the first record from the images array?</p>