Little trick to return json

Sorry for the poor english. 

I created a piece of code that solved my problem in returning a JSON object and helped me not to re-write all views. I await your feedback pros and cons.

 

class AppController extends Controller {
    public $components = array('RequestHandler');

 

    function beforeRender() {
        if ($this->RequestHandler->isAjax()) {
            $this->layout = 'ajax';
            $this->RequestHandler->setContent('json', 'application/json');
            $this->viewVars = json_encode($this->viewVars);
            return false;
        }
    }
}

If an Ajax request is performed automatically be returns a JSON object with the query result.

$.ajax({
url: "http://localhost/aplication/users",
type: "POST",
dataType: "json"
});

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