title: How to convert DateTime::now() into NaiveDateTime?
body: <p>I'm using Diesel and chrono. In my model I have a field of type <code>NaiveDateTime</code> which contains the <code>now()</code>. However, <code>NaiveDateTime</code> doesn't have the function <code>now()</code> or a similar one whereas <code>DateTime</code> does:</p>
  
  <pre><code>Utc::now()
  </code></pre>
  
  <p>How can I convert <code>Utc::now()</code> into <code>NaiveDateTime</code>?</p>