Talk:Web services

general remarks about OUTPUT of operations:

Is true of false informative enough ? Should the API have some sort of "last_error" function giving back more details such as "non existing course, non existing user, duplicate entry ...) Shall we consider that affecting a role that already exist or removing role that do not exist as an error (output=false) or not (output=true)

yep, agree, I'd result always one well defined $result object, with his status, error code and error msg (and perhaps, the whole original WS request encapsulated for easier debugging).