µWeb

If one of the _PostCreate, _PostInit or _PostSave hooks add a key to the Record dictionary, and the record is saved subsequently, the _Changes method will indicate that the record has pending changes, even though the _PreSave hook might remove those before they actually hit the database.

For that reason, _PreSave should be executed before changes in the record are determined. If changes have been made, the record should be stored in the database, and the _PostSave hook should then always run.