Gregwar\Formidable\Fields\Select::setValue PHP Метод

    public function setValue($value, $default = false)
    {
        if ($this->multiple) {
            if (is_array($value)) {
                foreach ($value as &$v) {
                    $v = (string) $v;
                }
                $this->value = $value;
            } else {
                $this->value = null;
            }
        } else {
            parent::setValue($value, $default);
        }
    }