rack_upload.RdStores the file at path under the given backend. With id = NULL a new
record is created and the backend mints its storage handle; otherwise a new
version is added to the existing record identified by id. This is a
low-level generic; most callers should use rack_save() instead.
rack_upload(backend, path, ...)A rack backend object (e.g. a pins_board).
Character scalar. Path to the local file to upload.
Additional arguments passed to the method, including name (the
board name, used to mint a handle when creating) and id (an existing
rack_id to add a version to, or NULL to create a record).
A rack_id object identifying the newly created version.
rack_save() for the high-level wrapper that serialises R data
before uploading, rack_download() for the complementary download generic.