{{ form_start(form, {'attr': {'class': 'needs-validation', 'novalidate': 'novalidate'}}) }}

    <div class="mb-3">
        {{ form_label(form) }}
        {{ form_widget(form, {'attr': {'class': 'form-control'}}) }}
        {% if form_errors(form) %}
            <div class="invalid-feedback">
                {% for error in form_errors(form) %}
                    <p>{{ error.message }}</p>
                {% endfor %}
            </div>
        {% endif %}
    </div>

    <div class="d-flex justify-content-left">
        <button type="submit" class="btn btn-success" style="background-color:green;">
            {{ button_label|default('Enregistrer') }}
        </button>
    </div>

{{ form_end(form) }}