Passing Appcontroller variables to Elements in Cakephp

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You can pass variables originating from Appcontroller’s callback through the method set for Cakephp layout Elements?

cakephp
  • 1

    yes yes, in the same way that you would pass a variable of any other controller to the viwe and Elements. The difference is that a variable of the AppController is available to all views and Elements of the system.

  • If I create a method within appController and call it through the callback beforeRender it will try to display a view?

  • 1

    I found out how, there is a method called Requestaction that can request information from any control and also pass parameters.. http://book.cakephp.org/2.0/pt/views.html#passing-variables-in-a-element

  • There’s that too, so finish post your answer

2 answers

1

Researching a little more, I found a way to solve:

The function requestAction() allows the views and even elements cakephp request information from any controller/action that you define, in true MVC style.

Simply declare an action on Controller specific:

class PostsController extends AppController {
    // ...
    public function index() {
        $posts = $this->paginate();
        if ($this->request->is('requested')) {   //Se for requisição de outra view/element:
            return $posts;
        } else {  //Senão envia para a view padrão
            $this->set('posts', $posts);
        }
    }
}

Then you call the function within another view or in this case, an element:

helpbox.ctp

<h2>Últimos posts</h2>
<?php $posts = $this->requestAction('posts/index'); ?> <!--Passa a Action como parâmetro -->
<?php foreach ($posts as $post): ?>
    <ol>
        <li><?php echo $post['Post']['title']; ?></li>
    </ol>
<?php endforeach; ?>

Bonus: Caching the element to decrease requests in the Bank:

By calling the element within some view or in the layout, use the argument cache:

echo $this->element('helpbox', array(), array('cache' => true));

So I can call anyone action declared as public in any controller, of any view, without the need to pollute my AppController.

References: http://book.cakephp.org/2.0/pt/views.html#passing-variables-in-a-element

0

But I have seen several users comment that it is not a good practice to use "requestAction", and even it will be discontinued in the cake version 3, but if you just want to set a global variable that can be accessed in other areas, could do so:

class AppController extends Controller 
{
    function beforeFilter()
    {
        $visivelElements = ClassRegistry::init('Configuration')->find('all');
        $this->set('visivelElements', $visivelElements);
    }
}

If it was only visible on a given controller only do one check, something like:

class AppController extends Controller 
{
    function beforeFilter()
    {
        if ($this->name == 'Home') {
            $visivelElements = ClassRegistry::init('Configuration')->find('all');
            $this->set('visivelElements', $visivelElements);
        }            
    }
}

  • I saw some commenting on this, but I saw Mark Story himself go back after testing in detail.

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