title: CakePHP: auto-set model create and update dates
body: <p>Is there a way to configure CakePHP models to automatically set timestamps, such as <strong>created_on</strong> and <strong>updated_on</strong>, when saving the object?</p>
  
  <p>I'm thinking of an equivalent to Django's DateTimeField's <strong>auto_now</strong> and <strong>auto_now_add</strong> options.</p>
  
  <p>I've heard this is a controversial practice in some frameworks, but I want to do it anyway.  </p>
  
  <p>If you <em>can't</em> do this, do people normally set the timestamps in the beforeSave() handlers, perhaps by checking if the model data already contains an id field and setting a creation data accordingly? </p>
  
  <p>Thanks, and apologies if I've missed the relevant bit in the docs.  </p>