title: Rails close without saving from edit page
body: <p>I have a typical CRUD app, I would like to add a link next to the f.submit that allows you to go back to the index without saving changes. I thought it would be as simple as just making a link to the index, but it's saving changes anyway.</p>
  
  <pre><code>&lt;%= button_to 'Close Without Saving', users_path %&gt;
  &lt;%= f.submit %&gt;
  </code></pre>
  
  <p>What's the rails way of handling this?</p>