Question

我在该表中使用表product作为外键dimension_id之一。因此，在服务层编写测试用例时，它会显示错误。这是我的测试用例

@Transactional(propagation = Propagation.REQUIRED)
    private ProductBO getProductBO() {
        SellerBO sellerBO = getSellerBO();
        ProductBO productBO = new ProductBO();
        productBO.setCategoryId(1);
        productBO.setDateAvailable("20/00/0000");
        productBO.setImage("a15cb5e");
        productBO.setLocation("for getting product details");
        productBO.setMinimum(26.00);
        productBO.setModel("service");
        productBO.setPoints(5);
        productBO.setPrice(12.2f);
        productBO.setQuantity("2");
        productBO.setSellerBO(sellerBO);
        productBO.setShipping(2);
        productBO.setSku("aqaqaq");
        productBO.setSortOrder("aes");
        productBO.setStatus(1);
        productBO.setStockStatusId("20");
        productBO.setProductName("Micromax");
        productBO.setSubtract(20.0001);
        productBO.setUpc("asd");
        productBO.setViewed(2);
        productBO.setWeight("25");
        productBO.setWeightClassBO(getWeightClassBO(productBO));
        productBO.setDimensionBO(getDimension());
        return productBO;
    }


public DimensionBO getDimension() {
        DimensionBO dimensionBO = new DimensionBO();
        dimensionBO.setHeight(12);
        dimensionBO.setLength(23);
        dimensionBO.setWidth(14);
        dimensionBO.setLengthClassBO(getLengthClass());
        try {
            manageDimensionServiceImpl.addDimension(dimensionBO);
        } catch (CrafartServiceException csExp) {
            csExp.printStackTrace();
            Assert.fail();
        }

        return dimensionBO;

    }

这是我的dimensionimpl

@Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void addDimension(DimensionBO dimensionBO) throws CrafartServiceException {

        DimensionDO dimensionDO = beanMapper.mapDimensionBOToDO(dimensionBO, new DimensionDO(), beanMapper.mapLengthClassBOToDO(dimensionBO.getLengthCassBO(), new LengthClassDO()));
        try {

            dimensionDAOImpl.addDimension(dimensionDO);
            dimensionBO.setDimensionId(dimensionBO.getDimensionId());
            //LengthClassDO lengthClassDO = lengthClassDAOImpl.getLengthClass(dimensionBO.getLengthCassBO().getLengthClassId());
            //dimensionDO.setLengthClassDO(lengthClassDO);
        } catch (CrafartDataException e) {
            throw new CrafartServiceException("Error while adding dimension", e);

        }

    }

这是我的尺寸DAOimpl

@Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void addDimension(DimensionDO dimensionDO) throws CrafartDataException {
        try {
            Session session = this.getSessionFactory().getCurrentSession();
            session.persist(dimensionDO);
        } catch (HibernateException hExp) {
            throw new CrafartDataException("DB Error while adding dimension details in table", hExp);
        }
    }

}

DO to BO mapping

public DimensionBO mapDimensionDOTOBO(DimensionDO dimensionDO,DimensionBO dimensionBO,LengthClassBO lengthClassBO) {
        dimensionBO.setDimensionId(dimensionBO.getDimensionId());
        dimensionBO.setHeight(dimensionBO.getHeight());
        dimensionBO.setLength(dimensionBO.getLength());
        dimensionBO.setWidth(dimensionBO.getWidth());
        dimensionBO.setLengthClassBO(lengthClassBO);
        return dimensionBO;
    }

BO到DO映射

public DimensionDO mapDimensionBOToDO(DimensionBO dimensionBO, DimensionDO dimensionDO ,LengthClassDO lengthClassDO)  {
        dimensionDO.setDimensionId(dimensionDO.getDimensionId());
        dimensionDO.setHeight(dimensionDO.getHeight());
        dimensionDO.setLength(dimensionDO.getLength());
        dimensionDO.setWidth(dimensionDO.getWidth());
        dimensionDO.setLengthClassDO(lengthClassDO);

        return dimensionDO;
    }

Answer 1

您获得Not-null property references a transient value transient instance must be saved before current operation的异常意味着当您持久化dimensionDO对象时，该对象的关系引用非持久化（是瞬态的）object，因此无法管理外键。

您的代码并未显示此关系的位置。也许当您从dimensioBO映射到dimensionDO时，您需要创建一个必须在之前保留的新实例。

另一方面，在productBO中，您有两个对新实例的引用，一个用于sellerBO，另一个用于dimensionBO。但是，您不会显示产品持久性的代码......

Not-null属性引用瞬态值瞬态实例必须在当前操作之前保存

1 个答案: