title: cant convert symbol to integer using select_tag
body: <p>could anyone please tell me what is wrong this this code?</p>
  
  <p>I get a <strong>can't convert Symbol into Integer</strong>
  Extracted source (around line #5):</p>
  
  <pre><code>3: &lt;% form_for @song_request do |f| %&gt;
  4: &lt;p&gt;Please select the event you are attending:&lt;/p&gt;
  5: &lt;%= select_tag('song_requests', 'event_id', Event.all.collect {|e| [e.name, e.id ] } ) %&gt;
  6: &lt;% end %&gt;
  </code></pre>