java将OneTONE链接更改为另一个id为的实体

Question

有问题，但在任何地方都找不到答案=）

我有实体包装

@Entity
public class Packing {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_packing")
    @SequenceGenerator(allocationSize = 100, name="seq_packing", sequenceName="seq_packing")
    @Getter
    long id;

    @Getter
    @Setter
    @OneToOne
    PackingDictionary packingDictionary;

    @Getter
    @Setter
    long price;

    @Getter
    @Setter
    long quantity;

    public Packing() {
    }

    public Packing(PackingDictionary packingDictionary, long price, long quantity) {
        this.packingDictionary = packingDictionary;
        this.price = price;
        this.quantity = quantity;
    }

    public void changePackingType(Long id){

    }
}

我使用OneToOne关系在Packing实体和packingdirectionary（即真正的dictionary）之间进行引用

那么，我怎样才能创建一个方法来更改对字典中已经存在的另一个id的引用呢

在SQL中，它只是更改打包表中的引用id

Answer 1

packingRepository.findById(id)
   .ifPresent(packing -> packing.setPackingDictionary(packingDictionaryRepository.getOne(dictionaryId))