{% for option_form in form.cartItem.variant %}
    <div class="col-lg-6 pt-1 pb-1">
        <h6>{{ form_label(option_form) }}</h6>
        {{ form_widget(option_form, { 'attr': { 'data-option': option_form.vars.name, 'class' : 'form-control' } }) }}
    </div>
{% endfor %}