title: Getting renders to recognize custom routing paths
body: <p>So I have a snazzy custom route for login</p>
  
  <pre><code># routes.rb
  map.login '/login', :controller =&gt; 'sessions', :action =&gt; 'new'
  </code></pre>
  
  <p>Visit www.asite.com/login and you're there.  As is custom with failed login, however, we'll do the following in our action.  Note what happens on failed login.</p>
  
  <pre><code> # sessions_controller.rb
  
   def create
     self.current_user = User.authenticate(params[:email], params[:password])
     if logged_in?
       # some work and redirect the user
     else
       flash.now[:warning] = "The email and/or password you entered is invalid."
       render :action =&gt; 'new'
     end
   end
  </code></pre>
  
  <p>This is very typical.  Simply render the new action and prompt for login again.  Unfortunately you also get with it an ugly URL: www.asite.com/session. Ick! Is it possible to get rendering to respect the original URL?</p>