@Test public void testUpdateNormal() throws SQLException { Transaction db = this.db.startTransaction(); List<School> schools = db.selectAll(School.class); School s = schools.get(0); Person p = new Person(); p.setId(2); p = db.load(p); System.out.println(p); System.out.println(p.getSchoolId()); System.out.println(p.getSchool()); p.setSchool(s); db.update(p); db.rollback(true); }