title: Mongoose use of .select() method
body: <p>I'm pretty confused with the use of the <code>select</code> method. This is how I use it, and it's wrong:</p>
  
  <pre><code>Transaction.find({username : user.username}).select('uniqueId', 'confirmation_link', 'item_name', 'timeout', 'username', function(err, txs){
          callback(txs);
  });
  </code></pre>
  
  <p>What I'm trying to achieve is simply to select from the transactions in the database the ones with that username and I want to take out just the fields listed in the <code>select</code> method. Can anyone point out how should I use the <code>select</code> method? Thanks.</p>