无法将文件所有权从服务帐户转移到google drive用户

Question

当试图转移所有权时，我得到以下错误：

"domain": "global",
"reason": "invalidSharingRequest",
"message": "Bad Request. User message: \"You can't change the owner of this item.\""

下面是我的代码：

use Google_Client; 
use Google_Service_Drive;
use Google_Service_Drive_DriveFile;
use Google_Service_Drive_Permission;

public function uploadDocument() {

 $FOLDER_ID = 'my_folder_ID_string';

 $client = new Google_Client();
 $client->setAuthConfig(base_path('service_account_credentials.json'));
 $client->setScopes(array('https://www.googleapis.com/auth/drive'));

 $service = new Google_Service_Drive($client);

 $fileMetadata = new Google_Service_Drive_DriveFile(array(
                                                     'name' => 'Test.pdf',
                                                     'parents' => [$FOLDER_ID]
                                                    ));

 $content = file_get_contents(public_path('tmp/Test.pdf'));

 $file = $service->files->create($fileMetadata, array(
                                                    'data' => $content,
                                                    'mimeType' => 'application/pdf',
                                                    'uploadType' => 'multipart',
                                                    'fields' => 'id'
                                                     ));

  // Transfer Ownership
  $newPermission = new Google_Service_Drive_Permission();
  $newPermission->setRole('owner');
  $newPermission->setType('user');
  $newPermission->setEmailAddress('[e-mail]');
  $optParams = array('transferOwnership' => 'true');

  $service->permissions->create($file->id, $newPermission, $optParams);

}

该文件夹已成功上传到共享文件夹中的Google Drive（所有者为'[e-mail]'，服务帐户为'editor')，但上传文件的所有者为服务帐户，编辑器为'[e-mail]'。

Answer 1

根据文档：

共享驱动器中的文件由共享驱动器所有，而不是单个用户。

因此，没有必要从服务帐户中“拿走”所有权。

通过添加以下行修改代码

$Client->SetSubject($emailofUsertoImpersonate)；