{{ form_start(form) }}
<div class="row">
    <div class="col-md-12">{{ form_row(form.code) }}</div>
    <div class="col-md-12">{{ form_row(form.nom) }}</div>
</div>
<div class="row">
    <div class="col-md-6">
        {{ form_row(form.estActif) }}
    </div>
</div>

{{ form_widget(form) }}
<button class="btn-add">{{ button|default('Enregistrer') }}</button>
{{ form_end(form) }}