Attach a file to a record from a script
How a Custom API puts a file a caller sent into a record's File column, and reads one back, without the caller ever reaching the record's own file endpoints.
How a Custom API puts a file a caller sent into a record's File column, and reads one back, without the caller ever reaching the record's own file endpoints.
How a file somebody picks on a portal screen reaches a record's File column, through the same Custom API everything else goes through.