我遇到了与审计相关的hibernate映射问题。 我的带有映射的java类:
@Entiy
@Audited
@Table(name = "farm_detail")
public class FarmDetail {
@Id
private Long id;
@ElementCollection
@MapKeyColumn(name = "field_id")
@Column(name = "remark")
@CollectionTable(name = "farm_detail_remark", joinColumns = @JoinColumn(name = "farm_detail_id"))
private Map<String, String> fieldRemarks = new HashMap<>();
// Getter, Setter, etc
}
farm_detail_remark
和farm_detial_remark_aud
表的sql定义:
db=# \d farm_detail_remark
Table "public.farm_detail_remark"
Column | Type | Modifiers
----------------+------------------------+-----------
farm_detail_id | bigint | not null
field_id | character varying(255) | not null
remark | character varying | not null
Indexes:
"farm_detail_remark_pkey" PRIMARY KEY, btree (farm_detail_id, field_id)
Foreign-key constraints:
"farm_detail_remark_farm_detail_id_fkey" FOREIGN KEY (farm_detail_id) REFERENCES farm_detail(id)
db=# \d farm_detail_remark_aud
Table "public.farm_detail_remark_aud"
Column | Type | Modifiers
----------------+------------------------+-----------
rev | integer | not null
revtype | smallint |
farm_detail_id | bigint | not null
field_id | character varying(255) | not null
remark | character varying |
Indexes:
"farm_detail_remark_aud_pkey" PRIMARY KEY, btree (rev, farm_detail_id, field_id)
Foreign-key constraints:
"farm_detail_remark_aud_rev_fkey" FOREIGN KEY (rev) REFERENCES revinfo(rev)
如果我想更新fieldRemarks
集的任何条目,我会在farm_detail_remark_aud
表上遇到重复的密钥错误。通过打开sql日志记录,我发现hibernate试图在aud表中插入两个条目:
Hibernate:
/* insert farm_detail_remark_AUD
*/ insert
into
farm_detail_remark_aud
(revtype, rev, farm_detail_id, remark, field_id)
values
(?, ?, ?, ?, ?)
21:20:58.188 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [1] as [INTEGER] - [0]
21:20:58.188 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [2] as [INTEGER] - [1057]
21:20:58.188 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [3] as [BIGINT] - [110]
21:20:58.188 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [4] as [VARCHAR] - [Old remark]
21:20:58.188 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [5] as [VARCHAR] - [152]
和(这里只有param绑定):
21:20:58.193 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [1] as [INTEGER] - [2]
21:20:58.194 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [2] as [INTEGER] - [1057]
21:20:58.194 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [3] as [BIGINT] - [110]
21:20:58.194 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [4] as [VARCHAR] - [new remark]
21:20:58.194 [main] TRACE o.h.t.d.s.BasicBinder - binding parameter [5] as [VARCHAR] - [152]
有没有办法解决这个问题,而没有为备注创建额外的实体?
我正在使用带有spring boot 1.5.7的hibernate 5.0.12。数据库是postgresql 9.5.6。
答案 0 :(得分:0)
我针对5.0.12和5.2.10对此进行了测试,在这两种情况下,为您的映射生成的表模式与您提供的表模式不同。这可能是您最近在最近升级Hibernate的遗留应用程序吗?
例如,在H2上,在我的测试中创建的表显示以下内容:
create table farm_detail_remark_AUD (
REV integer not null,
field_detail_id integer not null,
remark varchar(255) not null,
field_id varchar(255) not null,
REVTYPE tinyint,
primary key (REV, field_detail_id, remark, field_id)
)
因此,对于您的方案,不会生成重复的主键,因为remark
列作为主键索引的一部分包含在内,从而避免了您遇到的问题。