Simple Tree Management with Symfony2 / Propel / AdmigeneratorGeneratorBundle with forbidden path disabled

config.yml

# Twig Configuration
twig:
    form:
        resources:
            - 'MazenoviLightCmsBundle:Form:fields.html.twig'

EditType.php

<?php

namespace Mazenovi\LightCmsBundle\Form\Type\Folder;

use Admingenerated\MazenoviLightCmsBundle\Form\BaseFolderType\EditType as BaseEditType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\FormInterface;
use Mazenovi\LightCmsBundle\Model\FolderQuery;
use Mazenovi\LightCmsBundle\Form\EventListener\DisableNestedPathSubscriber;

class EditType extends BaseEditType
{

    public function finishView(FormView $view, FormInterface $form, array $options)
	{
        //http://stackoverflow.com/questions/14344639/symfony-2form-how-to-disable-specific-item-in-form-choice-type
		$nested_folder_ids = array();
        $nested_folder = FolderQuery::create()->childrenOf($view->vars['value'])->find();
        array_walk(
            $nested_folder,
            function($val, $key) use(&$nested_folder_ids){
                $nested_folder_ids[] = $val->getId();
            }
        );
        
        foreach ($view->children['parent_folder']->vars['choices'] as $parent) {
            if(in_array($parent->data->getId(), $nested_folder_ids) || $parent->data->getId() == $view->vars['value']->getId())
            {
                $parent->disabled = 'disabled';
            }
    	}
	}

}

fields.html.twig

{% block choice_widget_options %}
{% spaceless %}
    {% for group_label, choice in options %}
        {% if choice is iterable %}
            <optgroup label="{{ group_label|trans({}, translation_domain) }}">
                {% set options = choice %}
                {{ block('choice_widget_options') }}
            </optgroup>
        {% else %}
            <option value="{{ choice.value }}"{% if choice is selectedchoice(value) %} selected="selected"{% endif %} {% if choice.disabled is defined %} disabled="{{ choice.disabled }}"{% endif %}>{{ choice.label|trans({}, translation_domain) }}</option>
        {% endif %}
    {% endfor %}
{% endspaceless %}
{% endblock choice_widget_options %}