Question

我使用过myBatis，在应用启动期间出现错误：

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for pl.net.manager.dao.ProductDAO.getService()
### The error may exist in pl/net/manager/dao/ProductDAO.java (best guess)
### The error may involve pl.net.manager.dao.ProductDAO.getProduct
### The error occurred while handling results
### SQL: select * from product where id=?
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for pl.net.manager.dao.ProductDAO.getService()

我有以下表格：产品，服务，费率计划

我有三个DAO＆＃39>：

ProductDao这个：

@Mapper
public interface ProductDAO extends ServiceDAO, RateplanDAO {

    @Select("select * from product")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "productStatus", column = "product_status"),
            @Result(property = "createdBy", column = "created_by"),
            @Result(property = "createdDate", column = "created_date"),
            @Result(property = "modifiedBy", column = "modified_by"),
            @Result(property = "modifiedDate", column = "modified_date"),
            @Result(property = "service", column = "service", one = @One(select = "getService()")),
            @Result(property = "rateplan", column = "rateplan", one = @One(select = "getRateplan()"))
    })
    public List<Product> getProductList();

    @Select("select * from product where id=#{id}")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "productStatus", column = "product_status"),
            @Result(property = "createdBy", column = "created_by"),
            @Result(property = "createdDate", column = "created_date"),
            @Result(property = "modifiedBy", column = "modified_by"),
            @Result(property = "modifiedDate", column = "modified_date"),
            @Result(property = "service", column = "service", one = @One(select = "getService()")),
            @Result(property = "rateplan", column = "rateplan", one = @One(select = "getRateplan()"))
    })
    public Product getProduct(Integer id);

ServiceDAO：

@Mapper
public interface ServiceDAO {

    @Select("select * from service where id=#{id}")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "serviceStatus", column = "service_status"),
            @Result(property = "name", column = "name"),
            @Result(property = "createdBy", column = "created_by"),
            @Result(property = "createdDate", column = "created_date"),
            @Result(property = "modifiedBy", column = "modified_by"),
            @Result(property = "modifiedDate", column = "modified_date")
    })
    public Service getService(Integer id);

RateplanDAO：

@Mapper
public interface RateplanDAO {

    @Select("select * from rateplan where id=#{id}")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "name", column = "name"),
            @Result(property = "rateplanStatus", column = "rateplan_status"),
            @Result(property = "createdBy", column = "created_by"),
            @Result(property = "createdDate", column = "created_date"),
            @Result(property = "modifiedBy", column = "modified_by"),
            @Result(property = "modifiedDate", column = "modified_date")
    })
    public Rateplan getRateplan(Integer id);

我已经为产品编写了简单的测试：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = MainApplication.class)
@SpringBootTest
public class ProductDaoTest {

    @Autowired
    ProductDAO productDAO;

    @Test
    public void getAllProductsTest(){
        List<Product> list = productDAO.getProductList();
        assertNotNull(list);
        assertEquals(2, list.size());
    }

    @Test
    public void getSpecifiedProductTest(){
        Integer id =1;
        Product product = productDAO.getProduct(id);

        assertEquals(id, product.getId());

    }
}

如果我理解正确的问题是映射，但根据文档它应该一直在工作。你有一个想法，它是如何解决的？

Answer 1

您需要在@Result中删除方法名后的括号：

@Result(property = "service", column = "service", one = @One(select = "getService()"))

=＆GT;

@Result(property = "service", column = "service", one = @One(select = "getService"))

MyBatis映射@One注释问题

1 个答案: