title: Backbone wants to include created_at, updated_at, etc., but I don't want it to
body: <p>I'm using Backbone with Rails. I have a model that I can create and destroy just fine. When I edit, though, I get this error:</p>
  
  <pre><code>Can't mass-assign protected attributes: created_at, id, updated_at
  </code></pre>
  
  <p>That makes sense. Those attributes are protected and they should be protected. Backbone shouldn't be trying to update these attributes, but Backbone doesn't know better.</p>
  
  <p>One option, of course, would be to remove <code>params[:created_at]</code>, etc. in my Rails controller, but I can imagine that getting really un-DRY pretty quick, and plus it just seems wrong to have to do that.</p>
  
  <p>Is there a way for me to tell Backbone not to include these attributes in its forms?</p>