How to redirectToRoute() with arguments which are not part of the route?

Question

I have a Controller with two ...Action()-methods. When I call the route /newTask with the route name newTask inside the browser I have a form to set a Task-object. After submitting via Submit-Button I want to redirect to the route /success with the route name task_success:

class FormController extends Controller {

    /**
     * @Route("/newTask", name="newTask")
     */
    public function newAction(Request $request)
    {
        // create a task and give it some dummy data for this example
        $task = new Task();
        $task->setTask('Write a blog post');

        $task->setDueDate(new \DateTime('tomorrow'));
        $form = $this->createFormBuilder($task)
            ->add('task', TextType::class)
            ->add('dueDate', DateType::class)
            ->add('save', SubmitType::class, array('label' => 'Create Task'))
            ->getForm();

        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            //Here I want to redirect...
            return $this->redirectToRoute('task_success', array('task' => $task));
    }

        return $this->render('default/new.html.twig', array(
            'form' => $form->createView(),
        ));
    }

    /**
     * @Route("/success", name="task_success")
     */
    public function successAction($task){
        return $this->render('default/success.html.twig',array('task' => $task));
    }

}

As you can see the method successAction has a parameter $task which I need to to show the values with the success.html.twig, but I don´t need task as a part of the route (e.g. \success\{task}).

So how can I redirect with the argument $task without using it inside the route?

Answer 1

If you don't want display the task number in URL, you can pass its ID to the session flashBag before redirect and store it temporally:

$this->addFlash('success_task_id', $task->getId());

return $this->redirectToRoute('task_success');

Then, get this ID from session in you successAction method:

/**
 * @Route("/success", name="task_success")
 */
public function successAction(){
    $taskId = $this->get('session')->getFlashBag()->get('success_task_id');
    $task = $this->getDoctrine()->getRepository('AppBundle:Task')->find($taskId);

    return $this->render('default/success.html.twig', array('task' => $task));
}

However, if the visibility of the task number is not important, simply use it in newAction:

return $this->redirectToRoute('task_success', array('task' => $task->getId()));

This generate one URL like /success?task=1 and get the number from request query parameter bag in successAction:

public function successAction(Request $request){
    $taskId = $request->query->get('task');

    // ...
}

Another solution by using serialize and unserialize functions:

$this->addFlash('success_task', serialize($task));

return $this->redirectToRoute('task_success');

Then, get the serialized data from session in you successAction method:

/**
 * @Route("/success", name="task_success")
 */
public function successAction(){
    $task = unserialize($this->get('session')->getFlashBag()->get('success_task'));

    return $this->render('default/success.html.twig', array('task' => $task));
}