Using the Sharepoint REST API, I am able to get "Author" (which I take as owner/creator info) information for both Files and Folders. For Files, I can simply expand the "Author" element and get Title and UserId information. For Folders, I have to use the "AuthorId" field from expanding "ListItemAllFields" to make a subsequent REST call to resolve the Title and UserId information by Id (I don't like this extra step either but I haven't found a way to get that info for Folders with a single GET). However, for the base Lists and their associated "RootFolder"s, I do not get Author information, even if I expand the RootFolder's ListItemAllFields. Is there a way to get the owner\creator information for at least the Document Library Lists where my Folders and Files reside? I expected that expanding the RootFolder's ListItemAllFields would give me the "AuthorId" like it does for the sub-folders that have been created in the Document Library but all I get for this: .../_api/Web/GetFolderByServerRelativeUrl('docLibraryRootFolderServerRelativeUrl')/ListItemAllFields, is:
{
"d": {
"ListItemAllFields": null
}
}