Symfony4 Twig模板错误：变量“小部件”不存在

Question

我得到了Twig_Error_Runtime

我试图找到我犯的错误，但我看不到任何......也许我正在查看错误的文件，但我已经尝试在任何地方查找我已经做过更改，然后才会出现此错误。

这是我的枝条代码：

{% extends 'base.html.twig' %}
{% block body %}
    <div class="container">

        {% form_theme form 'bootstrap_4_layout.html.twig' %}
        {{ form_start(form) }}

        <br>

        Name {{ form_widget(form.name) }}
        Price {{ form_widget(form.price) }}
        Available {{ form_widget(form.available) }}
        Date {{ form_widget(form.date) }}
        <div class="row js-ticket-time-wrapper"
             data-prototype="{{ form_widget(form.times.vars.prototype)|e('html_attr') }}"
             data-index="{{ form.times|length }}">
            {% for time in form.times %}
                <div class="col-xs-4 js-ticket-time-item">
                    <a href="#" class="js-remove-time pull-right">
                        <span class="fa fa-close"></span>
                    </a>
                    {{ form_row(time.name) }}
                </div>
            {% endfor %}
            <a href="#" class="js-ticket-time-add">
                <span class="fa fa-plus-circle"></span>
                Add another Time
            </a>
        </div>
        <button type="submit" class="btn btn-primary" formnovalidate>Save</button>
        {{ form_end(form) }}
    </div>

{% endblock %}
{% block js %}
    {{ parent() }}
    <script>
        jQuery(document).ready(function() {
            var $wrapper = $('.js-ticket-time-wrapper');
            $wrapper.on('click', '.js-remove-time', function(e) {
                e.preventDefault();
                $(this).closest('.js-ticket-time-item')
                    .fadeOut()
                    .remove();
            });
            $wrapper.on('click', '.js-ticket-time-add', function(e) {
                e.preventDefault();
                // Get the data-prototype explained earlier
                var prototype = $wrapper.data('prototype');
                // get the new index
                var index = $wrapper.data('index');
                // Replace '__name__' in the prototype's HTML to
                // instead be a number based on how many items we have
                var newForm = prototype.replace(/__name__/g, index);
                // increase the index with one for the next item
                $wrapper.data('index', index + 1);
                // Display the form in the page before the "new" link
                $(this).before(newForm);
            });
        });
    </script>
{% endblock %}

我还对实体时间和票证进行了更改，但我不认为这是以某种方式连接的。

这是我的TicketType表单：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('name',TextType::class)
        ->add('price',MoneyType::class)
        ->add('available',IntegerType::class)
        ->add('date',DateType::class)
        ->add('times', CollectionType::class, array(
            'entry_type' => AppFormTimeType::class,
            'allow_delete' => true,
            'by_reference' => false,
            'allow_add' => true,
    ));
}

这是TimeType：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('name', TextType::class);
}