title: Two Association Label Elements in Simple Form
body: <p>How can I add two label elements when choosing association in Simple Form on Ruby on Rails?</p>
  
  <p>Sample: <code>@user.name = "Barack"</code> and
  <code>@user.last_name = "Obama"</code></p>
  
  <p>Here is my code:</p>
  
  <pre><code>&lt;%= f.association :persona, :collection =&gt; Persona.order(:name), 
  :prompt =&gt; 'Choose a person' %&gt; 
  </code></pre>
  
  <p>It displays only Barack but I need it to display not only <code>name</code> but also <code>last_name</code> when choosing from list.</p>