方法redirectToRoute（）是否有像render（）这样的参数？

Question

I need to access an entity in twig from symfony2. Inside the controler, I can do something as:

return $this->render('frontendBundle::carrodecompras.html.twig', array(
        'entity' => $entity
));

And then in twig I can access the entity properties with entity.name and such.

I need to accomplish the same thing but with the function redirectToRoute()

return $this->redirectToRoute('frontend_carrodecompras', array(
        'entity' => $entity,
));

But it doesn't seem to work.

I'm getting the following error:

Variable "entity" does not exist in frontendBundle::carrodecompras.html.twig at line 32

EDIT: I'm using Symfony 2.7

The variable $entity exists (it's actually called $cortina in the app I was using $entity for simplification), just before the redirectToRoute function I did this to test it

echo "<pre>";
var_dump($cortina);
echo "</pre>";

return $this->redirectToRoute('frontend_carrodecompras', array(
                'cortina' => $cortina,
                ));

And the result is this:

object(dexter\backendBundle\Entity\cortina)#373 (16) {
  ["id":"dexter\backendBundle\Entity\cortina":private]=>
  int(3)
  ...

This is the Twig code:

<tr>
    {% set imagentela = "img/telas/" ~ cortina.codInterno ~ ".jpg" %}
    <td><img src="{{ asset(imagentela | lower ) }}" alt="" width="25" height="25">
    </td>
    <td>{{ cortina.nombre }}</td>
    <td>{{ "$" ~ cortina.precio|number_format('0',',','.') }}</td>
</tr>

Answer 1

When you call redirectToRoute($route, array $parameters) from a controller, $parameters is used to generate the url tokens, not variables to render in view, this is done by the controller assigned to the route you are redirecting to.

example :

class FirstController extends Controller
{
    /**
     * @Route('/some_path')
     */
    public function someAction()
    {
        // ... some logic
        $entity = 'some_value';

        return $this->redirectToRoute('some_other_route', array('entity' => $entity)); // cast $entity to string
    }
}

class SecondController extends Controller
{
    /**
     * @Route('/some_other_path/{entity}', name="some_other_route")
     */
    public function otherAction($entity)
    {
        // some other logic
        // in this case $entity equals 'some_value'

        $real_entity = $this->get('some_service')->get($entity);

        return $this->render('view', array('twig_entity' => $real_entity));
    }
}