Symfony 3 : How to Embed a Collection of Forms - after submit I only have one element in the array instead of many - symfony

Question

Hello guys,
On Symfony 3 :
I tried to follow the requirements of "How to Embed a Collection of Forms" from Symfony 3 Documentation. It works for a defined list as they propose first. But when I try the next step: Allowing new Tags with the Prototype, it only returns my last embed Form.
So I know that my Entity works, aswell as the EntityType. The error must be on the Twig.
Thanks in advance for your help!
It works for a defined list as they propose in the first part.
So I know that my Entity works, aswell as the EntityType.
enter code here
{% extends "#App/baseAdmin.html.twig" %} .
{% block contenu %} .
{#{{ dump(formreservation) }}#} .
{#{{ form(formreservation) }}#} .
<div> .
Date : {{ "now"|date("d/m/Y") }} .
{{ form_start(formreservation, {'attr': {'class': 'form'}}) }} .
{#{{ dump(formreservation) }}#} .
<p> .
{#retourne message erreur si besoin après méthode isValid dans Controleur#} .
{{ form_errors(formreservation.spectacle) }} .
{{ form_label(formreservation.spectacle, null,
{'label_attr': {'class': 'form-label'}}) }} :
{{ form_widget(formreservation.spectacle, {'attr':
{'class': 'form-control'}}) }} .
</p>
<p>
{{ form_label(formreservation.spectateur, null,
{'label_attr': {'class': 'form-label'}}) }}
<ul class="spectateur" data-prototype="{{ form_widget(formreservation.spectateur.vars.prototype)|e('html_attr') }}">
</ul>
</p>
<p>
{#retourne message erreur si besoin après méthode isValid dans Controleur#}
{{ form_errors(formreservation.client) }}
{{ form_label(formreservation.client, null,
{'label_attr': {'class': 'form-label'}}) }} :
{{ form_widget(formreservation.client, {'attr':
{'class': 'form-control'}}) }}
</p>
{# génération du champ CSRF - _token# (Cross Site Request Forgeries en champ caché #}
{{ form_rest(formreservation) }}
{{ form_end(formreservation) }}
</div>
{# Partie JavaScript #}
<script
src="https://code.jquery.com/jquery-3.3.1.js"
integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="
crossorigin="anonymous">
</script>
<script>
var $collectionHolder;
// setup an "add a tag" link
var $addTagButton = $('<button type="button" class="add_tag_link">Ajoutez un spectateur</button>');
var $newLinkLi = $('<li></li>').append($addTagButton);
jQuery(document).ready(function() {
// Get the ul that holds the collection of tags
var $collectionHolder = $('ul.spectateur');
// add a delete link to all of the existing tag form li elements
//inutile pour le moment, ajoute un bouton qui créé la confusion
/* $collectionHolder.find('li').each(function() {
addTagFormDeleteLink($(this));
});*/
// add the "add a tag" anchor and li to the tags ul
$collectionHolder.append($newLinkLi);
// count the current form inputs we have (e.g. 2), use that as the new
// index when inserting a new item (e.g. 2)
$collectionHolder.data('index', $collectionHolder.find(':input').length);
$addTagButton.on('click', function(e) {
// add a new tag form (see next code block)
e.preventDefault();
addTagForm($collectionHolder, $newLinkLi);
});
});
function addTagForm($collectionHolder, $newLinkLi) {
// Get the data-prototype explained earlier
//console.log($collectionHolder);
var prototype = $collectionHolder.data('prototype');
//console
// get the new index
var index = $collectionHolder.data('index');
var newForm = prototype;
// You need this only if you didn't set 'label' => false in your tags field in TaskType
// Replace '__name__label__' in the prototype's HTML to
// instead be a number based on how many items we have
newForm = newForm.replace(/__name__label__/g, 'Spectateur n° '+ index);
//newForm = newForm.replace(/__name__/g, index);
// increase the index with one for the next item
$collectionHolder.data('index', index + 1 );
// Display the form in the page in an li, before the "Add a tag" link li
var $newFormLi = $('<li></li>').append(newForm);
$newLinkLi.before($newFormLi);
// add a delete link to the new form
addTagFormDeleteLink($newFormLi);
}
function addTagFormDeleteLink($tagFormLi) {
var $removeFormButton = $('<button type="button">enlever ce spectateur</button><br>');
$tagFormLi.append($removeFormButton);
$removeFormButton.on('click', function(e) {
// remove the li for the tag form
e.preventDefault();
$tagFormLi.remove();
});
}
</script>
{% endblock %}
Expected result : a collection containing all the embed Forms.
Actually it only returns the last element in the embed Form. I did check on the Entity and it doesn't use the "add" method that I did add to the entity.
here the add part of ReservationType builder:
->add('spectateurs', CollectionType::class, [
'entry_type' => SpectateurReservationType::class,
'entry_options' => ['label' => false],
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'by_reference' => false,
] .
) .

Answer 1

)
You just have commented a part of JS code
newForm = newForm.replace(/__name__/g, index);
Uncomment this and anything would be nice

Answer 2

my line was:
newForm = newForm.replace(/name__label/g, 'Spectateur n° '+ index);
My mistake was, I thought I could change this as a textlabel:
Great it only was this! many thanks, you save me! Now it works perfectly!