title: Get full rails controller name, including the namespace
body: <p>I've many controllers in different namespaces. The controller_name method only returns the name of the controller, e.g. 'articles'.
  Is there any chance to get the full name like 'service/articles' (the articles controller is in the service namespace)?</p>
  
  <p>I want do create a link to the index action of each controller via a globally used partial:</p>
  
  <pre><code>&lt;%= link_to controller.display_name, { :controller =&gt; controller.controller_name, :action =&gt; "index"} %&gt;
  </code></pre>
  
  <p>If this partial is rendered in a view in the 'users' namespace, I get an error: users/articles has no route (it should be service/articles).</p>