java - Spring 数据存储库在未映射的 POJO 上具有 native 命名查询

Question

我有一个名为company的POJO，它映射到名为company的数据库表 我有一个只有两个字段的 native 查询(由于遗留原因，公司有很多我想删除的急切映射)

系统正在使用 spring 数据 我想映射为 native 查询并仅将这两个标量填充到我的公司列表中 我该如何使用 CompanyRepository 来做到这一点？

@Entity
@Audited
@Table(name = "company")
@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
  @NamedNativeQuery(
      name = "getDefaultBuyers",
      query =
          "SELECT c.id as id ,c.name as name"
              + "FROM complex query with non mapped tables "
      resultSetMapping = "getDefaultBuyersMapping")

 @SqlResultSetMapping(
      name = "getDefaultBuyers",
      columns = {@ColumnResult(name = "name"),@ColumnResult(name = "id")})
public class Company {
 @Column(name = "id", nullable = false, length = 32)
 protected String id;
@Column(name = "name", nullable = false)
 protected String name;
//diffrent properties 
}

@Repository
public interface CompanyRepository
    extends JpaRepository<Company, Long>, JpaSpecificationExecutor<Company>{}

编辑 我不认为它很优雅，但是这个有效，有人可以帮我做得更优雅

@Repository
public interface CompanyRepository
    extends JpaRepository<Company, Long>, JpaSpecificationExecutor<Company>{
@Query(
      value =
          "SELECT c.id as id ,c.name as name FROM bidder_config b, native_version n, company c WHERE ...",
      nativeQuery = true)
  Object[][] getDefaultBuyers(); ```

Answer 1

显然 Spring 数据中存在一个问题，解决方法如下:

@Repository
public interface CompanyRepository
    extends JpaRepository<Company, Long>, JpaSpecificationExecutor<Company>{
    @Query(nativeQuery = true)
  List<DefaultBuyerDTO> getDefaultBuyers();
}

参见https://github.com/spring-projects/spring-data-examples/tree/master/jpa/jpa21#support-for-custom-sqlresultsetmapping-with-constructorresult欲了解更多信息