{% if edit is defined %}
    {% set action = '' %}
    {% else %}
    {% set action = path('taille_ecran_new') %}
{% endif %}


{{ form_start(form,{action : action}) }}
    {{ form_widget(form) }}
    <button class="btn btn-success my-3">{{ button_label|default('Créer') }}</button>
{{ form_end(form) }}