title: Plain object mongoose not work with sort
body: <p>I need plain javascript object instead of mongoose object.</p>
  
  <p><strong>Query</strong></p>
  
  <pre><code>chatModel.find({'userId':userId},{
              "_id":0,"message":1,"type":1            
             }).sort({createdDateISO:-1})
            .lean().exec((err,result)=&gt;{
        });
  </code></pre>
  
  <p>But I will get mongoose object when I remove the <code>sort()</code> I am getting the plain javascript object.
  How do i get the plain object with sort??</p>