Symfony2 - Handle collection type prototype in twig with jquery

form.html.twig

{% block stylesheet %}
<script src="{{ asset("js/jquery.collection.js") }}"></script>
{% endblock %}

{% block body %}

<h1>{{ "Form with an addresses collection" }}</h1>

<form action="{{ path('route') }}" method="post" {{ form_enctype(form) }}>

  {{ form_row(form.firstname) }}
  {{ form_row(form.lastname) }}
  {{ form_row(form.birthDate) }}
  {#{ form_row(form.whateverYouWant }#}
  <hr />
  
  <div class="collection" id="{{ "address" }}" data-prototype="{{ _self.address(form.addresses.vars.form.vars.prototype)|escape }}">
  {% for address in form.addresses.vars.form.children %}
      {{ _self.address(address) }}
  {% endfor %}
  </div>

  <a href="#" onClick="javascript: return false;" class="{{ "add-item" }}">
    {{ "Add an address" }}
  </a>

  {% macro address(form) %}
      <div class="{{ "item" }} classe classe-{{ form.vars.name }}">
          <a href="#" class="{{ "remove-item" }}">
              {{ "Delete this address" }}
          </a>
          {{ form_row(form.street) }}
          {{ form_row(form.address) }}
          {{ form_row(form.postalCode) }}
          {{ form_row(form.city) }}
          {{ form_row(form.country) }}
          {#{ form_row(form.whateverYouWant }#}
      </div>
      <hr/>
  {% endmacro %}
  
  {{ form_rest(form) }}
</form>
{% endblock %}

{% block javascript %}
{{ parent() }}
<script type="text/javascript">
  (function($){
    $('.collection').collection();
  })(jQuery);
</script>
{% endblock %}

jquery.collection.js

/**
 * jQuery Collection Plugin v1.0.0
 * This class provide javascript collection handler features to dynamically add and remove elements inside a form.
 * 
 * https://gist.github.com/Maxooo/85b67f72ec3840464c4e/edit
 * 
 * Copyright 2013, 2014 Maxime CORSON <maxime.corson@spyrit.net>
 * 
 * Released under the MIT license
 */
(function ($) {
    $.fn.collection = function( options ) {
        
        var defaults = {
            itemSelector: '.item',
            addSelector: '.add-item',
            removeSelector: '.remove-item',
            onAdd: function($item){},
            onRemove: function(){}
        };
        
        return this.each(function() {
            var $this = $(this);
            var settings = $.extend(true, {}, defaults, options, $this.data());

            function addAddListener()
            {
                $(settings.addSelector).on('click', function(e) {
                    var $item = addCollectionItem();
                    settings.onAdd($item);
                });
            };
            
            function addRemoveListener()
            {
                $this.find(settings.removeSelector).on('click', function(e) {
                    $(this).parents(settings.itemSelector).remove();
                    settings.onRemove();
                });
            };
            
            function addCollectionItem()
            {
                var item = $($this.attr('data-prototype').replace(/__name__/g, $this.children().length));
                $this.append(item);
                addRemoveListener();
                return item;
            };
            addAddListener();
            addRemoveListener();      
        });
    };
}( jQuery ));

UserAddressType.php

<?php
namespace Acme\TaskBundle\Form\Type;

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

class UserAddressType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
          ->add('street')
          ->add('address')
          ->add('postalCode')
          ->add('city')
          ->add('country')
          //->add('whateverYouWant')
          ;
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Acme\TaskBundle\Entity\UserAddress', // Propel model is better ;)
        ));
    }

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

UserType.php

<?php
namespace Acme\TaskBundle\Form\Type;

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

class UserType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
          ->add('firstname')
          ->add('lastname')
          ->add('birthDate')
          ->add('addresses', 'collection', array(
            'type' => new Acme\TaskBundle\Form\Type\UserAddressType(), 
            'allow_add' => 'true',
            'allow_remove' => 'true',
            //'by_reference' => 'false', // Use this option if you are on Propel
          ))
          //->add('whateverYouWant')
          ;
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Acme\TaskBundle\Entity\User', // Propel model is better ;)
        ));
    }

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