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这 3 个表是“分析组”、“实验室说明”、“观察到的属性”。每个表都有一个“id”主键列。

我想使用第四个表（“analyticalgroups_observedproperties_labinstructions”）来存储 OneToMany 关系。最终，我希望输出的结构如下：

analyticalGroup: {
  id: "...",
  observedPropertyLabInstructions: [
    {observedProperty, labInstruction},
    {observedProperty, labInstruction},
    {observedProperty, labInstruction},
    ...etc...
  ]
}

我已经在网上关注了一些示例，但无法使其正常工作。问题是当我尝试这个时，我收到以下错误：

“消息”：“存储库发生错误：PSQLException：错误：列observedpr0_.observedpropertyentitylabinstructionmap_id 不存在\n 位置：6550”，“errorCode”：“gaia.domain.exceptions.RepositoryException”，

这是连接表的结构。

CREATE TABLE analyticalgroups_observedproperties_labinstructions
(
  analyticalgroupid character varying(36) NOT NULL,
  labinstructionid character varying(36) NOT NULL,
  observedpropertyid character varying(36) NOT NULL,
  CONSTRAINT fk_analyticalgroups_observedproperties_labinstructions_groupid FOREIGN KEY (analyticalgroupid)
      REFERENCES analyticalgroups (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE CASCADE,
  CONSTRAINT fk_analyticalgroups_observedproperties_labinstructions_labinstr FOREIGN KEY (labinstructionid)
      REFERENCES labinstructions (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE CASCADE,
  CONSTRAINT fk_analyticalgroups_observedproperties_labinstructions_observed FOREIGN KEY (observedpropertyid)
      REFERENCES observedproperties (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE CASCADE
)

@Entity
@Data
public class AnalyticalGroupEntity {

    public static final String ENTITY_NAME = "analyticalGroups";
    public static final String JOIN_OBSERVEDPROPERTIES_LABINSTRUCTIONS_TABLE_NAME =
            ENTITY_NAME +
                    IDomainEntity.UNDERSCORE +
                    ObservedPropertyEntity.ENTITY_NAME +
                    IDomainEntity.UNDERSCORE +
                    LabInstructionEntity.ENTITY_NAME;

    @Id
    @Column(name = IDomainEntity.ID_KEY, nullable = false, columnDefinition = IDomainEntity.COLUMN_TYPE_UUID)
    private String id;

    @OneToMany
    @JoinTable(
            name = JOIN_OBSERVEDPROPERTIES_LABINSTRUCTIONS_TABLE_NAME,
            joinColumns = @JoinColumn(name = LabInstructionEntity.ID_KEY, referencedColumnName = IDomainEntity.ID_KEY, table = "labinstructions")
    )
    @MapKeyJoinColumn(name = ObservedPropertyEntity.ID_KEY, referencedColumnName = IDomainEntity.ID_KEY, table = "observedproperties")
    private Map<ObservedPropertyEntity, LabInstructionEntity> observedPropertyLabInstructions;

}

希望我已经尽可能清楚地说明了这一切。非常感谢您的帮助。谢谢阅读！

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1 回答 1

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编辑实际上......事实证明这不起作用。它成功地获取了我想要的数据，但它还会在我发出 GET 请求时删除连接表中的每一行 *翻转表 *

太奇怪了！

@OneToMany
@JoinTable(
        name = JOIN_OBSERVEDPROPERTIES_LABINSTRUCTIONS_TABLE_NAME,
        joinColumns = @JoinColumn(name = "analyticalgroupid", referencedColumnName = IDomainEntity.ID_KEY, table = "labinstructions"),
        inverseJoinColumns = @JoinColumn(name = LabInstructionEntity.ID_KEY, referencedColumnName = IDomainEntity.ID_KEY, table = "labinstructions")
)
@MapKeyJoinColumn(name = ObservedPropertyEntity.ID_KEY, referencedColumnName = IDomainEntity.ID_KEY, table = "observedproperties")
private Map<ObservedPropertyEntity, LabInstructionEntity> observedPropertyEntityLabInstructionEntityMap;
于 2016-05-11T17:55:18.267 回答