删除操作我看看下面的实体:嵌入式对象春天JPA
@Entity(name = "USRGRP_MAP")
public class UserGroupMapping {
@Id
@Column(name = "USRGRP_ID")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "USER_GRP_MAP_SEQ")
@SequenceGenerator(sequenceName = "usrgrp_map_seq",allocationSize = 1,name = "USER_GRP_MAP_SEQ")
private Long mappingId;
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "USER_ID", referencedColumnName = "USER_ID")
private User user;
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "USR_GRP_ID", referencedColumnName = "USR_GRP_ID")
private UserGroup group;
@Column(name = "USR_USRGRP_ACT")
private String userGroupAct;
getter/setters
}
@Entity(name = "USER")
public class User {
@Id
@Column(name = "USER_ID")
private Long userId;
@Column(name = "LOGIN_ID")
private String userName;
getter/setters
}
@Entity(name = "USR_GRP")
public class UserGroup {
@Id
@Column(name = "USR_GRP_ID")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "USER_GRP_SEQ")
@SequenceGenerator(sequenceName = "usr_grp_seq",allocationSize = 1,name = "USER_GRP_SEQ")
private long groupId;
@Column(name = "GRP_NM")
private String groupName;
@Column(name = "GRP_DESC")
private String groupDesc;
getter/setters
}
UserGroupMapping包含有许多与用户和组的一个关系。 现在我想要做UserGroupMapping为我创造库如下CRUD操作:
public interface UserGroupMappingRepository extends JpaRepository<UserGroupMapping, Long> {
List<UserGroupMapping> findByGroup(UserGroup group);
List<UserGroupMapping> findByUser(User user);
}
现在我想要写,删除操作(特别是用户和组)上UserGroupMapping而不删除用户和USR_GRP中的任何条目表,只需要从USRGRP_MAP表中删除条目。
我试图使用本机查询来实现它:
@Query(value = "delete from USR_USRGRP_MAP where user_id = :userId and usr_grp_id = :groupId",nativeQuery = true)
void deleteUserGroupMappingByUserAndGroup(@Param("userId") Long userId, @Param("groupId") Long groupId);
面对异常无效的SQL语法,但在SQL Developer中查询做工精细。
下面是我的服务类:
@Service
public class UserGroupMappingServiceImpl implements UserGroupMappingService{
@Autowired
private UserGroupMappingRepository repository;
@Override
public void deleteUserGroupMapping(Long userId, Long groupId) {
repository.deleteUserGroupMappingByUserAndGroup(userId,groupId);
}
}
可能有人建议删除而不删除用户和组UserGroupMapping进入正确的方法是什么?
下面是USRGRP_MAP表:
USRGRP_ID USER_ID USR_USRGRP_ID USR_USRGRP_ACT
------------- ---------- ------------- -
41 306106 41 Y
14 108527 14 Y
8 295597 8 N
10 296518 10 Y
11 295597 11 Y
在此先感谢。
请提供完整的堆栈跟踪 –