title: Mongoose with mongodb how to return just saved object?
body: <p>I'm new to mongoose/mongodb</p>
  
  <p>Say I'm saving something:</p>
  
  <pre><code>var instance = new TestingModel();
  instance.test = 'blah2';
  instance.save();
  </code></pre>
  
  <p>So when I save that the instance obj in the db will have, _id and test.  But the _id attribute is added to the object only after entering the db.  Note: I don't want to give it an id before.  However, I want to grab the object in the db because I need to use the _id value, but I don't want to query it again.  Is there a way where you save the object in the database and auto returns the database object so you can get the _id value?</p>