title: MongoDb double find on update query
body: <p>I finded a data my mongodb database. I want be update a array's field this data.
  My data is here:</p>
  
  <p><a href="http://paste.ubuntu.com/8447715/" rel="nofollow">http://paste.ubuntu.com/8447715/</a></p>
  
  <p>I want will find this data and update home adress. I am trying: <br></p>
  
  <pre><code>$Data = array(
                      '$set' =&gt; array(
                          'address.name' =&gt; 'home'
                  )
                  ); &lt;br&gt;
  $users-&gt;update(array('username' =&gt; 'micheal', 'address.name' =&gt; 'hame') ,$Data);
  </code></pre>
  
  <p>What's wrong ?
  My english is bad,sorry</p>