Symfony2 / FOSUserBundle: Change render variables in response without altering parent class - php

Question

One of my classes currently extends the BaseController on the FOSUserBundle, and returns the parent action. However, due to project spec, I shouldn't have the need to edit the parent class. Is there a way of sending additional variables, for twig to render, through the child response?
Child Class:
class ChangePasswordController extends BaseController
{
public function changePasswordAction(Request $request)
{
$response = parent::changePasswordAction($request);
return $response; // and 'myVariable' => $myVariable
}
}
Parent Class:
class ChangePasswordController extends ContainerAware
{
/**
* Change user password
*/
public function changePasswordAction(Request $request)
{
//lots of code.....
return $this->container->get('templating')
->renderResponse(
'FOSUserBundle:ChangePassword:changePassword.html.'
.$this->container->getParameter('fos_user.template.engine'),
array(
'form' => $form->createView()
//and 'myVariable' => $myVariable
)
);
}
}
So to summarise, is there a way of passing something to the parent class, without changing the parent class... whilst rendering the twig view with an additional variable.
-- Update --
Essentially I want to render a form using the FOSUserBundle changePassword action, therefore this works fine:
return $this->container
->get('templating')
->renderResponse(
'FOSUserBundle:ChangePassword:changePassword.html.'.$this->container->getParameter('fos_user.template.engine'),
array('form' => $form->createView())
);
However, I want to pass more variables to the view, just like the 'form' is passed as shown above, without altering the FosUserBundle ChangePassword Controller. Therefore I have a class which inherits the that controller, adds some additional functionality and returns the parent change password action:
class ChangePassController extends ChangePasswordController
{
public function changePasswordAction(Request $request)
{
// more code......
$response = parent::changePasswordAction($request);
return $response;
}
}
But, like with most applications, I want to add more than just the form variable to a view template. So is there a way of passing an additional variable to the view, without altering the parent controller / action? Like (but not like) pushing 'myVariable' => $myVariable to the parent changePasswordAction return statement?

Answer 1

There is a section in FOSUserBundle documentation that describes exactly how to do that, and from Symfony2's Cookbook, How to use Bundle Inheritance to Override parts of a Bundle.
In summary, create a Bundle class to override FOSUserBundle in src:
// src/Acme/UserBundle/AcmeUserBundle.php
<?php
namespace Acme\UserBundle;
use Symfony\Component\HttpKernel\Bundle\Bundle;
class AcmeUserBundle extends Bundle
{
public function getParent()
{
return 'FOSUserBundle';
}
}
Then, override the ChangePasswordController class:
use FOS\UserBundle\Controller\ChangePasswordController as BaseController;
class ChangePasswordController extends BaseController
{
public function changePasswordAction(Request $request)
{
$response = parent::changePasswordAction($request);
return $response; // and 'myVariable' => $myVariable
}
}
--UPDATE--
Ok I think I misread you question. Anyway what renderResponse() of the templating service does is essentially:
$response->setContent($this->render($view, $parameters));
You can see the Class of the templating service by running app/console container:debug which is actually the TwigEngine class.
So you can just re-invoke renderResponse() and supply you own extra parameters. eg:
return $this->container->get('templating')->renderResponse(
'FOSUserBundle:ChangePassword:changePassword.html.'.$this->container->getParameter('fos_user.template.engine'),
array(
'form' => $form->createView(),
'myVariable' => $myVariable', // There you go
),
$response // The previous response that has been rendered by the parent class, by this is not necessary
);

Answer 2

Think bottom up.
You can access your data without passing it through action, using Twig Extension http://symfony.com/doc/current/cookbook/templating/twig_extension.html
twig.extension.user_profile:
class: 'MyBundle\UserProfileExtension'
arguments:
- '#doctrine.orm.entity_manager'
tags:
- { name: twig.extension }
Extension class
class UserProfileExtension extends \Twig_Extension
{
/**
* #var EntityManager
*/
private $entityManager;
/**
* #param UserProfileDataService $userProfileDataService
*/
public function __construct(EntityManager $entityManager)
{
$this->entityManager = $entityManager;
}
/**
* #return array
*/
public function getFunctions()
{
return array(
new \Twig_SimpleFunction('get_my_custom_var', array($this, 'getMyCustomVar')),
);
}
/**
* #return array
*/
public function getMyCustomVar()
{
$var = $this->entityManager->getRepository('MyCustomRepository')->findOneBy(['id' => 1]);
return $var;
}
/**
* Returns the name of the extension.
*
* #return string The extension name
*/
public function getName()
{
return 'user_profile_extension';
}
Template usage
{dump(get_my_custom_var())}

Answer 3

if I am understanding your question correctly you should be able to set additional variables on the response like this:
use FOS\UserBundle\Controller\ChangePasswordController as BaseController;
class ChangePasswordController extends BaseController
{
public function changePasswordAction(Request $request)
{
$response = parent::changePasswordAction($request);
$response['myVariable'] = $myVariable;
return $response;
}
}
Hope this helps!