SqlResultSetMapping在POJO

Question

我有一个简单的POJO：

我想标题列映射到标题字段：

@SqlResultSetMapping(
     name = "ownerSaleMapping", 
     classes = { 
       @ConstructorResult(
         targetClass = OwnerSale.class, 
         columns = { 
           @ColumnResult(name = "title", type = String.class) 
         } 
       ) 
     } 
) 

@NamedNativeQuery(name = "ownerSaleReport", query = "SELECT title FROM content where id=:contentId", resultSetMapping = "ownerSaleMapping") 
public class OwnerSale { 

    public OwnerSale() { 
    } 

    private String title; 

    public OwnerSale(String title) { 
     this.title = title; 
    } 

    public String getTitle() { 
     return title; 
    } 

    public void setTitle(String title) { 
     this.title = title; 
    } 
} 

我的仓库接口：

public interface OwnerSaleRepository extends JpaRepository<OwnerSale, Long> { 

    List<OwnerSale> ownerSaleReport(@Param("contentId") Long ownerId); 
} 

但是，当我” m使用：

List<OwnerSale> sales = ownerSaleRepository.ownerSaleReport(6); 

I g加时赛此错误：

IllegalArgumentException: Not an managed type: class domain.owner.OwnerSale 

但我需要OwnerSale是POJO不是Entity。

解决方案是什么？

Answer 1

如果你不能把你的对象变成Entity，那么也许它更容易使用JdbcTemplate与简单RowMapper？

private JdbcTemplate jdbcTemplate; //it depends on your config how to get it here. 

List<OwnerSale> ownerSaleReport(Long ownerId){ 
    String sql = "SELECT title FROM content where id=:contentId" 
    return jdbcTemplate.query(StringUtils.replaceEach(sql, 
       new String[]{":contentId"}, 
       new String[]{ownerId.toString()}), 
       (rs, i) -> { 
        OwnerSale ownerSale = new OwnerSale(); 
        ownerSale.setTitle(rs.getString("title"));//(or using constructor) 
        return ownerSale; 
       }); 
} 

这里我用StringUtils来自Apache的，但你可以使用任何其他方式成参数传递给String