Ip\Internal\Grid\Model\Field\RepositoryFile::updateData PHP Метод

    public function updateData($postData)
    {
        if ($this->fileLimit == 1) {
            if (!isset($postData[$this->field][0])) {
                $value = null;
            } else {
                $value = $postData[$this->field][0];
            }
        } else {
            if (!isset($postData[$this->field][0])) {
                $value = json_encode(array());
            } else {
                $value = json_encode($postData[$this->field]);
            }
        }
        return array($this->field => $value);
    }