Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

問題描述：

用jpa刪除數據庫記錄報錯：

org.springframework.orm.jpa.JpaSystemException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1; nested exception is org.hibernate.jdbc.BatchedTooManyRowsAffectedException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

Caused by: org.hibernate.jdbc.BatchedTooManyRowsAffectedException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

修改前代碼：

Dao層：

@Repository
public interface FtFileInfoDAO extends JpaRepository<FtFileInfoDO, BigInteger> {

    List<FtFileInfoDO> findAllByDataId(Long dataId);

    @Transactional
    Long deleteByDataId(Long dataId);

}

Entity層：

@Entity
@Table(name = "ft_file_info")
@Data
public class FtFileInfoDO {
    @Id
    /**
     * 數據ID
     */
    @Column(name = "data_id")
    private Long dataId;
}

調用：

//這個時候id對應兩條記錄
Long fileInfoRes = ftFileInfoDAO.deleteByDataId(id);

解決方法：

只需要修改Entity層，增加id屬性

@Entity
@Table(name = "ft_file_info")
@Data
public class FtFileInfoDO {
    @Id
    /**
     * 主鍵ID
     */
    @Column(name = "id")
    private Long id;
    /**
     * 數據ID
     */
    @Column(name = "data_id")
    private Long dataId;
}