inserting new records when id is set as serial

Hello
i found that you can do a ```Db.persons.insertRecords([onePerson], cn: db);``` there's just a problem with my setting, id is serial, so if i insert a new record, i do not set the id and let postgres handle this for me,  but for easyorm id is int and not int? so i can't specify a new record, how am i supposed to do it?
