/**
 * Transformer une date
 */
public function fieldFilterValueDateCreation($object)
{
    if (empty($object->date_creation)) {
        return null;
    }
    return dol_print_date($object->date_creation, 'dayhour');
}

/**
 * Formater un prix
 */
public function fieldFilterValuePrice($object)
{
    return (float) $object->price;
}

/**
 * Statut en texte
 */
public function fieldFilterValueStatus($object)
{
    $statuses = [
        0 => 'draft',
        1 => 'validated',
        2 => 'closed'
    ];
    return $statuses[$object->status] ?? 'unknown';
}