jpa非主键多对多自关联怎么注解
系统是spring data jpa
A状态表字段:id,t_id,mth及其他,分别是自增主键,关联描述表的主键,月份
B描述表:id,及其他
C关联表:t_id1,t_id2,多对多,表示相同mth,t_id=t_id1依赖t_id=t_id2的表
A实体类的结构:
@Entity
public class A{
@Id
private int id;
@ManyToOne
@JoinClomn(name = "t_id")
private B b;
@ManyToMany
private List<A> dps;
private String mth;
......省略
}
上面的dps要怎么注解,才能让系统自动注入,要达到的sql效果:
select * from A as A1 join B on A1.t_id = b.id join C on A1.t_id = C.t_id1 join A as A2 on C.t_id2 = A2.t_id and A1.mth = A2.mth
where .....
尝试过:
@JoinTable(name = "C",
joinColumns = {@JoinColumn(name = "t_id1", referencedColumnName="t_id")},
inverseJoinColumns = {@JoinColumn(name = "t_id2", referencedColumnName="t_id")})
@JoinColumn(name = "mth")
结果报错,提示什么重复了
请问下,这种情况用注解怎么实现啊?