title: codeIgniter mongoDB delete document not work with id
body: <p>This is not working:</p>
  
  <pre><code>function delmodel()
  {
     $this-&gt;mongo_db-&gt;where-&gt;(array('_id'=&gt;'5195b4293f8f31362a4f2093'))-&gt;delete('links');
  }
  </code></pre>
  
  <p>This is working:</p>
  
  <pre><code>function delmodel()
  {
      $this-&gt;mongo_db-&gt;where-&gt;(array('url'=&gt;'www.google.com'))-&gt;delete('links');
  }
  </code></pre>
  
  <p>I am working with CodeIgniter MongoDB and I'm totaly baffled with my output.</p>