/**
 * Shortcut to return the request service.
 *
 * @return Request
 *
 * @deprecated Deprecated since version 2.4, to be removed in 3.0. Ask
 *       Symfony to inject the Request object into your controller
 *       method instead by type hinting it in the method's signature.
 */
public function getRequest()
{
  return $this->container->get('request_stack')->getCurrentRequest();
}

use Symfony\Component\HttpFoundation\Request;
public function updateAction(Request $request)
{
  $foo = $request->get('foo');
  $bar = $request->get('bar');
}

$foo = $request->request->get('foo');

$foo = $request->query->get('foo');