title: RoR - collection_select from array
body: <p>I've a little array:</p>
  
  <pre><code>@dates= ['2013-11-01', '2013-11-02', '2013-11-03', '2013-11-04', '2013-11-05']
  </code></pre>
  
  <p>how can i put these array in an collection_select in the view? I tried:</p>
  
  <pre><code>...    
  &lt;%= f.collection_select :day, Day.order(:date), :id, @dates, include_blank: false %&gt;
  ...
  </code></pre>