使用HQL更新对象不起作用

Question

我写了这个hql查询以更新对象

Session session = sessionFactory.getCurrentSession();
session.beginTransaction();
Query modelQuery = session.createQuery("from Model m where m.modelId=:modelId");
modelQuery.setInteger("modelId", car.getModel().getModelId());
Model carModel = (Model) modelQuery.uniqueResult();
Query query = session.createQuery("update Car set model = :model,price=:price,quantity=:quantity,carDesc=:cardesc,enginCc=:engincc,trans=:trns,noOfCylinder=:noOfCylindr,topSpeed=:topSpeed,fuelType=:fuelType,fuelCapacity=:fuelCapacity "
                        + " where carId = :carId");
        query.setEntity("model", carModel);
        query.setParameter("price", car.getPrice());

        query.setParameter("quantity", car.getQuantity());
        query.setParameter("cardesc", car.getCarDesc());
        query.setParameter("engincc", car.getEnginCc());
        query.setParameter("trns", car.getTrans());
        query.setParameter("noOfCylindr", car.getNoOfCylinder());
        query.setParameter("topSpeed", car.getTopSpeed());

        query.setParameter("fuelType", car.getFuelType());
        query.setParameter("fuelCapacity", car.getFuelCapacity());
        query.setParameter("carId", car.getCarId());

        int result = query.executeUpdate();

        System.out.print("RESULT----->"+result);

然而，它不会抛出任何异常，它只在控制台中给出0