Question

我在这里有以下情况：

广告系列包含许多用户。每个用户由广告系列ID，用户ID和他的分支标识。映射如下：

@Entity
public class Campaign {

    @Id
    private Integer id;

    @OneToMany(mappedBy = "campaign", cascade = ALL)
    private Set<UserByCampaign> usersByCampaign;

}

UserByCampaign类以这种方式定义：

@Entity
public class UserByCampaign {

    @EmbeddedId
    private UserByCampaignPk id;

    @MapsId("userId")
    @ManyToOne
    @JoinColumn(name = "FK_USER", referencedColumnName = "ID")
    private User user;

    @MapsId("campaignId")
    @ManyToOne
    @JoinColumn(name = "FK_CAMPAIGN", referencedColumnName = "ID")
    private Campaign campaign;

    private String branch;

    @Embeddable
    public static class UserByCampaignPk implements Serializable {
        private Integer userId;
        private Integer campaignId;
    }
}

还有一个User类：

@Entity
public class User {

    @Id
    private Integer id;

    @OneToMany(mappedBy = "user")
    private Set<UserByCampaign> usersByCampaign;

}

当然，我已经压缩了剩下的代码以缩短代码。每次我尝试使用一堆User持久化Campaign对象时，它会抛出一个异常，试图插入一个新用户。不用说，异常的堆栈表明违反了用户表的唯一约束。

INFO:   Hibernate: select SEQ_CAMPAIGN.nextval from dual
INFO:   Hibernate: insert into CAMPAIGN (...)
INFO:   Hibernate: insert into USER (STATUS, ID) values (?, ?)
WARN:   SQL Error: 1, SQLState: 23000
ERROR:   ORA-00001: unique constraint (SYS_C0083506) violated

INFO:   HHH000010: On release of batch it still contained JDBC statements
WARNING:   DTX5014: Caught exception in beforeCompletion() callback:

删除@MapsId注释并将@ManyToOne两个映射设为insertable=false和updatable=false，它可以根据需要运行。

我正在使用Java SE8，JavaEE7和Payara4.1运行基于maven的Web应用程序。

修改

我使用Hibernate 4.3运行它，但在更新到5.2.10.Final之后也会发生。

@MapsId无法使用共享@EmbeddedId

0 个答案: