title: before_filter syntax when you want to "except" controller "abc"
body: <p>In Rails what is the before_filter syntax when you want to "except" controller "abc".</p>
  
  <p>Example, in the application_controller if I want to say:</p>
  
  <pre><code>before_filter :login_required :except =&gt; ["-name of controller-"]
  </code></pre>
  
  <p>Background - Just wanted basic authentication across the whole app except the controller that actually handles getting a user authenticated....</p>