public function __construct()
{
    global $db;
    $this->db = $db;

    // Extrafields en lecture seule
    $extRO = getDolGlobalString('MONMODULE_SMARTMAKER_EXTRAFIELDS_RO');
    if (!empty($extRO)) {
        foreach (explode(',', $extRO) as $field) {
            $field = trim($field);
            if (!empty($field)) {
                $key = 'options_' . $field;
                $this->listOfPublishedFields[$key] = $key;
            }
        }
    }

    // Extrafields en lecture-écriture
    $extRW = getDolGlobalString('MONMODULE_SMARTMAKER_EXTRAFIELDS_RW');
    if (!empty($extRW)) {
        foreach (explode(',', $extRW) as $field) {
            $field = trim($field);
            if (!empty($field)) {
                $key = 'options_' . $field;
                $this->listOfPublishedFields[$key] = $key;
                $this->writableFields[] = $key;
            }
        }
    }

    $this->boot();
}