title: Symfony2 - How to render a view from another controller
body: <p>I have two controllers, homepage and Security.</p>
  
  <p>In the homepage, I am displaying one view and in the security, I am doing some things, and one of them is the email address validation.</p>
  
  <p>What I would like is that when the email validation code is not valid, display the homepage with a flash message. For that, I will have to render the indexAction of the HomepageController, from the Security controller, by giving him as parameter the flash message.</p>
  
  <p>How can this be done? Can I render a route or an action from another controleller?</p>
  
  <p>Thank you in advance.</p>