title: Submit Rails 4 form with link instead of button
body: <p>I see some issues similar but they seem contrived and mostly for previous versions of Rails.</p>
  
  <p>What is the simplest way to submit a form with an anchor tag (link) instead of the normal button</p>
  
  <pre><code>&lt;%= f.submit 'Search', :class =&gt; "button expand"%&gt;
  </code></pre>
  
  <p>What is the most concise way (best practice) way to change that to a link that submits?</p>