title: How to show a Entity value of type array on list action in Sonata Admin Bundle?
body: <p>How Can I display array value on entitty in sonata admin bundle list action?
  I've tried to do something like this:</p>
  
  <pre><code>            -&gt;add('daysOfWeek', null, array('type' =&gt; 'array'))
  </code></pre>
  
  <p>in configureListFields method but then I get error:
  "An exception has been thrown during the rendering of a template ("Notice: Array to string conversion"</p>