Can anybody tell me how to get a list of just files in a particular folder on OneDrive using Microsoft Graph API? I believe I found an approach I have to use but either I don't understand something or it is impossible. I can get a list of children items in a folder. I can use $filter=folder ne null to get just a list of folders but I don't understand how to get a list of files. If I negate the expression, make it $filter=folder eq null it gives me an error. I tried many other possible expressions like $filter=file ne null, $filter=size ne 0 even though it is not exactly a filter for files a files can be 0 size but anyway it gives an error as well.
Update:
Tested in a test tool. It gives
{
"error": {
"code": "invalidRequest",
"message": "Invalid request",
"innerError": {
"date": "2021-02-23T06:25:08",
"request-id": "4d1903d3-d989-4d90-8130-479ac1b24af2",
"client-request-id": "4d1903d3-d989-4d90-8130-479ac1b24af2"
}
}
for this query
https://graph.microsoft.com/v1.0/me/drive/root/children$filter=folder eq null
Here is the link to the tool
https://developer.microsoft.com/en-us/graph/graph-explorer