java - Hibernate一对一关系错误

Question

我有这种关系

    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "candidacy")
@XmlElement
@Getter
@Setter
private InformCandidacy informCandidacy;



    @OneToOne
@JoinColumn(name = "candidacy_id", nullable = false, insertable = false, updatable = false)
@Getter
@Setter
private Candidacy candidacy;

在数据库中我声明我的 FK

                <addForeignKeyConstraint baseColumnNames="candidacy_id" baseTableName="inform_candidacy" constraintName="fk_candidacy_inform_candidacy"   onDelete="CASCADE" onUpdate="CASCADE" referencedColumnNames="id" referencedTableName="candidacy"/>

但是当我尝试坚持级联 Candidacy 并保存第一次在数据库中尚不存在的 InformCandidacy 时，它们之间的关系尚未创建，并且 InformCandidacy 对于 Candidacy 为空

    @Override
public void saveAll(final List<Candidacy> candidacies) {
    for (Candidacy candidacy : candidacies) {
        Candidacy candidacyDB = findById(candidacy.getId());
        candidacy.getInformCandidacy().setCandidacy(candidacyDB);
        candidacyDB.setInformCandidacy(candidacy.getInformCandidacy());
        candidacyRepository.save(candidacyDB);
    }
}

在我的 InformCandidacy 表中，我与 Candidacy 没有关系

       *************************** 1. row ***************************
            id: 101
      candidacy_id: NULL <--------- WTF!
     selected_number: NULL
     information_letter: NULL
    selection_decision: NULL
     selectionReport: 2014-06-28

我做错了什么。

问候。

Answer 1

您的映射告诉 hibernate 不要插入或更新“candidacy_id”列(insertable = false，updatable = false)。试试这个方法:

@OneToOne
@JoinColumn(name = "candidacy_id", nullable = false)
@Getter
@Setter
private Candidacy candidacy;