Question

我正试图了解具有以下特征的项目表格的内容(项目_id和中型_id是来自项目和中表的外国钥匙)。

@Entity(name = "ITEM_MEDIUM")
@RequiredArgsConstructor
@AllArgsConstructor
@Setter
@Getter
public class ItemMedium {
    @Id
    @JsonProperty("ITEM_MEDIUM_ID")
    @GeneratedValue(generator = "ITEM_MEDIUM_SEQ")
    @SequenceGenerator(name="ITEM_MEDIUM_SEQ", sequenceName = "ITEM_MEDIUM_SEQ", allocationSize = 1)
    private Long itemMediumId;
    @JsonProperty("ITEM_ID")
    private Long itemId;
    @JsonProperty("MEDIUM_ID")
    private Long mediumId;
    @JsonProperty("ARCHIVE_STATUS")
    private String archiveStatus;
    @JsonProperty("TYPE")
    private String type;
    @JsonProperty("STATUS")
    private String status;
    @JsonProperty("QUANTITY")
    private Long quantity;
    @JsonProperty("START_CONSUMPTION_DATE")
    private Date startConsumptionDate;
    @JsonProperty("END_CONSUMPTION_DATE")
    private Date endConsumptionDate;
    @JsonProperty("CREATE_DATE")
    private Date createDate;
    @JsonProperty("LAST_MODIFIED")
    private Date lastModified;
}

然而,当我试图从存放处获得所有内容时,它不会再回任何东西。我做了什么错误?

Answer 1

You need to annotate the relationship between the tables. @ManyToOne or @OneToMany or @OneToOne

Answer 2

更新类似关系

public class ItemMedium {
    @JsonProperty("ITEM_ID")
    @ManyToOne
    private Item itemId;
}

or

public class ItemMedium {
    @JsonProperty("ITEM_ID")
    @OneToMany
    private List<Item> itemId;
}

or

public class ItemMedium {
    @JsonProperty("ITEM_ID")
    @OneToOne
    private Item itemId;
}

同样,<代码>Medium也是如此。

友情链接