reactivemongo.api.commands.FindAndModifyCommand
the modifier document.
the command result must be the new object instead of the old one.
if true, creates a new document if no document matches the query, or if documents match the query, findAndModify performs an update
the command result must be the new object instead of the old one.
the modifier document.
if true, creates a new document if no document matches the query, or if documents match the query, findAndModify performs an update
Update (part of a FindAndModify command).
the modifier document.
the command result must be the new object instead of the old one.
if true, creates a new document if no document matches the query, or if documents match the query, findAndModify performs an update