title: select SUM in Cake
body: <p>When I tried using follow code to get the sum of the column named <code>Serviceinfo.services</code></p>
  
  <pre><code>$conditions = array('fields'=&gt;array('SUM(Serviceinfo.services) as servicecount'),'conditions'=&gt;array('time_id BETWEEN ? AND ?'=&gt;array($startid,$endtid)));
  $services = $this-&gt;Serviceinfo-&gt;find('all',$conditions);
  </code></pre>
  
  <p>I had to fetch the sum data with <code>services[0][0]['servicecount']</code> which seems a little weird.And What I expect is <code>services['Serviceinfo']['servicecount']</code>,or more simple one.Then how can I fix this?Thanks in advance!</p>