title: NodeJS and MongoDB FindAndModify() need remove or update
body: <p>im  trying to do a findAndModifiy in mongodb with nodejS, This is my code:</p>
  
  <pre><code>var nextBill = function (db, success, log) {
      var collection = db.collection('autoincrements');
      log.debug('autoIncrementRepository', 'nextBill');
      var result = collection.findAndModify({
          query: { _id: 'auto' },
          update: { $inc: { bill: 1 } },
          new: true
      });
  
      success(result.bill);
  };
  </code></pre>
  
  <p>EDIT:</p>
  
  <p>Try with callback</p>
  
  <pre><code>collection.findAndModify({
          query: { _id: 'auto' },
          update: { $inc: { bill: 1 } },
          new: true
      }, function (e, result) {
          success(result.budget);
      });
  </code></pre>
  
  <p>But give me the error need remove or update..But im doing it..</p>