I think I saw a way to append fields to table using only a variable, something like this in pseudocode: variable auditFields = defineFields (unique_id =Field('unique_id','boolean',default=uuid.uuid4(),writable=False,readable=False), bla bla) and now, for each table you can do: db.define_table('mytable', other fields,.., auditFields) I couldnt find it but I'm almost sure that I saw it.