title: Accessing application helpers from RailsEngine
body: <p>I have Rails application with mounted Engine.</p>
  
  <pre><code>#{main_app}/config/routes.rb
  mount CommentIt::Engine =&gt; "/talk", :as =&gt; 'comment_it'
  </code></pre>
  
  <p>And want to open engine views within main application layout. </p>
  
  <pre><code>#{main_app}/app/views/layouts/application.html.erb
  &lt;html&gt;
    &lt;body&gt;
      &lt;%= link_to "users", users_path %&gt;
      &lt;%= yield %&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>When accessing engine views(0.0.0.0:3000/talk) I got error <strong>'undefined method `users_path' for #&lt;#:0x007f9dbf0f7800>'</strong>
  users_path works fine in main application views. 
  How I get route helpers from main application, when accessing Engine pages? </p>