macro.twig

{% macro display_selectize(form) %}
    {% set csv = "" %}
    {% for tag in form %}
        {% set csv = csv ~ tag.vars.value.getName() ~ ", " %}
    {% endfor %}
    {% spaceless %}
    <div class="form-group" id="{{ form.vars.name }}-container">
        <label for="{{ form.vars.id }}">{{ form.vars.label }}</label>
        <input type="text" id="{{ form.vars.id }}" class="tags" value="{{ csv }}" data-prototype="{{ _self.hidden_prototype(form.vars.prototype.children)|e }}" data-container="tags-container" />
    </div>
    {% endspaceless %}
{% endmacro %}