Question

我有这种关系

@OneToOne(orphanRemoval = true, optional = true, cascade = {CascadeType.ALL},  mappedBy = "publicProcurement", fetch = FetchType.LAZY)
@Getter
@Setter
private Announcement announcement;


@OneToOne
@JoinColumn(name = "public_procurement_id", nullable = false, insertable = false, updatable = false)
@Getter
@Setter
private PublicProcurement publicProcurement;

这里是我的外键约束

 <addForeignKeyConstraint baseColumnNames="public_procurement_id" baseTableName="announcement" constraintName="announcement_public_procurement_ibfk_1" onDelete="RESTRICT" onUpdate="RESTRICT" referencedColumnNames="id" referencedTableName="public_procurement"/>

现在在我的服务中我这样做

@Override
public void addAnnouncement(final Integer id, final PublicProcurement publicProcurementForm) {
    PublicProcurement publicProcurement = get(id);
    Announcement announcement = publicProcurementForm.getAnnouncement();
    announcement.setApprovedName(userService.getUserName());
    announcement.setPublicProcurement(publicProcurement);
    announcementService.save(announcement);
    publicProcurement.setAnnouncement(announcement);
    save(publicProcurement);
}

但是当我保存announcementService.save（公告）;我收到以下异常

Caused by: java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`etendering_test`.`announcement`, CONSTRAINT `announcement_public_procurement_ibfk_1` FOREIGN KEY (`public_procurement_id`) REFERENCES `public_procurement` (`id`))
at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:132) ~[mariadb-java-client-1.1.2.jar:na]
at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106) ~[mariadb-java-client-1.1.2.jar:na]
at org.mariadb.jdbc.MySQLStatement.executeQueryEpilog(MySQLStatement.java:266) ~[mariadb-java-client-1.1.2.jar:na]
at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:289) ~[mariadb-java-client-1.1.2.jar:na]
at org.mariadb.jdbc.MySQLStatement.executeUpdate(MySQLStatement.java:317) ~[mariadb-java-client-1.1.2.jar:na]
at org.mariadb.jdbc.MySQLPreparedStatement.executeUpdate(MySQLPreparedStatement.java:150) ~[mariadb-java-client-1.1.2.jar:na]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:133) ~[hibernate-core-4.2.7.Final.jar:4.2.7.Final]

我尝试了一切，但我不知道Hibernate的错误。任何想法的人？

问候。

Answer 1

我认为在这种情况下你确实错误了插入优先级，所以在保存“announcement”对象之前你必须保证带有约束ID的publicProcerument已经存在于DB上：

也许你应该尝试在下面重新订购：

announcementService.save(announcement);
publicProcurement.setAnnouncement(announcement);
save(publicProcurement);

要：

publicProcurement.setAnnouncement(announcement);
save(publicProcurement);
announcementService.save(announcement);

删除注释insertable = false，updatable = false

如果这无法帮助您解决问题，那么最好向我展示您的实体。

Hibernate无法添加或更新子行问题

1 个答案: