#folders 5 articles

• getfolderbyserverrelativeurl returns 200 for a folder that does not existgotchas / rest-apiIt answers HTTP 200 with {"Exists": false} (and ListItemAllFields 200 with {"odata.null": true}), so a check on response.ok skips creating the folder and the next call 404s inside breakroleinheritance; measure the…
• A # or % in a file or folder name — the classic …Url APIs cannot reach it, and the old writes quietly save %25gotchas / rest-apiThe classic …ServerRelativeUrl lookups, Files/add(url=), folders/add, moveto and copyto cannot reach it even encoded: 404/400, Exists: false for a folder that exists, and writes that answer 200 but save a literal %25…
• A folder created with folders/AddUsingPath in a generic list has no list item — breaking its permissions returns 404gotchas / rest-apiIn a custom list (BaseTemplate 100) web/folders/AddUsingPath creates a 'naked' folder: ListItemAllFields is odata.null (@odata.null under SPFx's OData v4) and breakroleinheritance is 404. Create list folders with…
• A folder's Files collection rejects a two-level $expandgotchas / rest-apiListItemAllFields/Editor 400s there; take ModifiedBy/Author from the file, and list one level through the folder API rather than a FileDirRef filter
• Copy jobs fed with file URIs: the folders you pre-create carry your account and today's date – and the TaxCatchAll warning is just image tagsgotchas / rest-apiA CreateCopyJobs job that gets folder URIs carries folder metadata, a job fed with file URIs needs existing target folders, and folders created with AddUsingPath show the running account and the creation time until you…