hibernate不执行update,不抛错?报错

Shipment shipment = shipmentDao.getByDate(id, shipmentDate);
            OrderDetail od = baseDao.getById(OrderDetail.class, id);
            if (order == null) {
                order = od.getOrder();
            }
            if (shipment == null) {
                shipment = new Shipment();
                shipment.setOrderDetail(od);
                shipment.setTotal(total);
                shipment.setQuantity(quantity);
                shipment.setShipmentDate(shipmentDate);
                shipment.setType(type);
                baseDao.saveByObject(shipment);//这里执行保存成功
            } else {
                //因为Shipment是ManytoOne OrderDetail 并且是OrderDetail,这里获得的OrderDetail是lazy的od,这会造成下面的baseDao.updateByObject(od);不执行
                //如何解决
                shipment.setTotal(total);
                shipment.setQuantity(quantity);
                shipment.setType(type);
                baseDao.updateByObject(shipment);//这里不执行更新,也不打印update sql
            }
            od.setShipment(total);

            baseDao.updateByObject(od);

求大神帮忙

1.为何能保存到shipment,却不能update shipment,也不报错

2.如何解决获取的OrderDetail是lazy,我想从DB里获取,不是从缓存

另外一个方法

Shipment shipment = baseDao.getById(Shipment.class, id);
        baseDao.deleteByObject(shipment);
        OrderDetail od = shipment.getOrderDetail();
        od.setShipment(od.getShipment() - shipment.getTotal());
        baseDao.updateByObject(od);
        Order order = od.getOrder();
        order.setShipment(order.getShipment() - shipment.getTotal());
        baseDao.updateByObject(order);
        ProductionProcess process = productionProcessDao.getByOrderDetailAndDate(od.getId(), shipment.getShipmentDate());
        process.setShipment(0);
这里第2行也出现不能删除shipment