is_id()) { //először ki kell törölni a coachokat $delete_coach_query = "DELETE FROM training_coach WHERE trc_training_tr_id = " . $this->get_id() . ";"; $sql->execute_query($delete_coach_query); $delete_query = "DELETE FROM training WHERE tr_id = " . $this->get_id() . ";"; $sql->execute_query($delete_query); header("Location: /admin/trainings"); } ?>