{% form_theme form 'bootstrap_4_layout.html.twig' %}
{% for message in app.flashes('notice') %}
    <div class="alert alert-success" role="alert">
        {{ message }}
    </div>
{% endfor %}
{% if form_errors(form) %}
    <div class="alert alert-success" role="alert">
        {{ form_errors(form) }}
    </div>
{% endif %}
{{ form_start(form, {'attr':{novalidate:'novalidate', class:'data-form'}}) }}
{{ form_widget(form) }}
{{ form_end(form) }}