Problem generate custom choice_widget

form

{% block choice_widget %}
    {% for child in form %}
        {{ form_widget(child) }}
    {% endfor %}
{% endblock %}

gistfile1.php

<?php

namespace AppBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class CommentType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('content', 'text');
        $builder->add(
            'rating',
            'choice',
            [
                'choices' => [1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5],
                'expanded' => true,
                'multiple' => false
            ]
        );
        $builder->add('spoiler', 'checkbox');
    }

    public function getName()
    {
        return 'comment';
    }
}

output

<div class="radio">
    <label class="required">
        <input type="radio" id="comment_rating_0" name="comment[rating]" required="required" value="1">
        1
    </label>
</div>