Geoserver WFS-T, write to PostGIS and default table values (current_user() and now())

Question

In my table definition I have default values for auditing i.e logging the database user creating the record and time

date_created date NULL DEFAULT now(),
edited_by varchar NULL DEFAULT "current_user"(),

When a record is inserted via Geoserver WFS-T these default values are not triggered. I am curious to why and if I can do something about it?

Both these basic examples triggers the default values to inject expected default values

INSERT INTO test_table
(notes, dato, edited_by)
VALUES('test', now(), "current_user"());

INSERT INTO test_table
(notes)
VALUES('test2');

Make me belive Geoserver actually produces this SQL?

INSERT INTO test_table
    (notes, dato, edited_by)
    VALUES('test', null, null);

Answer 1

Solved using triggers in the database for the operation rather than rely on default table definitions.