title: mongoose, getting object's id after using collection.insert
body: <p>I'm trying to get the object id after adding it to the db (using <code>collection.insert</code>)</p>
  
  <pre><code>mongoose.model('Persons').collection.insert(person, function(err, newPerson) {
   console.log('lets see you', newPerson);
  });
  </code></pre>
  
  <p>and from the console I'm getting only <code>result: { ok: 1, n: 1 }</code> in stand of the new obj, any ideas how can I rich to the new object ?</p>
  
  <p>thanks!</p>