java - ManyToMany 的 JPA Criteria 规范

Question

我的实体 Client 和 Agency 具有 ManyToOne 关系，因此表 client 的列 agency_id 指向表agency，还有Client:

@ManyToOne
@JoinColumn(name = "agency_id")
private Agency agency;

Spring Data JPA 规范可以选择具有 Agency id 的 Client:

public static Specification<Client> withAgencyIds(Collection<Long> agencyIds) {
    return (root, query, cb) -> root.join(Client_.agency).get(Agency_.id).in(agencyIds);
}

现在我必须将 ManyToOne 关系更改为 ManyToMany 关系，以便 Client 具有:

@ManyToMany
@JoinTable(name = "client_agency",
           joinColumns = @JoinColumn(name = "client_id"),
           inverseJoinColumns = @JoinColumn(name = "agency_id"))
@OrderBy("name")
private List<Agency> agencies = new ArrayList<>();

我应该如何调整上述规范才能选择具有 Agency ID 的 Client？

提前非常感谢您!

Answer 1

这个 JPA Criteria 规范工作正常:

public static Specification<Client> withAgencyIds(Collection<Long> agencyIds) {
    return (root, query, cb) -> root.join(Client_.agencies).get(Agency_.id).in(agencyIds);
}