Files that should exist cannot be retrieved from the API

Question

My application uses "GET /drives/{drive-id}/items/{item-id}/children" to search for items in the drive and make sure no files with the same name exist.

However, uploading a file using "POST /drives/{driveId}/items/{itemId}/createUploadSession" returns "nameAlreadyExists" and the upload fails.

Please let me know if there are any conditions for items that cannot be retrieved with GET /drives/{drive-id}/items/{item-id}/children.

Answer 1

Hi @Mitsutoshi Shibuya

The request options in your question can only be used to upload a new version of an already existing document by using the id of the document. A folder does not have a document, that can be replace with a newer version. Therefore, it is not possible to create an upload session for a folder. You need to specify the name of the file as a relative path after the folder id in order to create an upload session for a new file in the folder:

https://graph.microsoft.com/v1.0/sites/{siteId}/drives/{driveId}/items/{folderId}:/{fileNameUploadFile}:/createUploadSession

You can also use the folder name instead of the folder id:

https://graph.microsoft.com/v1.0/sites/{siteId}/drives/{driveId}/root:/{folderName}/{fileNameUploadFile}:/createUploadSession

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