嘗試將正確的關系數據添加到一對多聯接的另一側時，我遇到了此異常。由于某種原因，它沒有自動獲取 car_id這是我的代碼。汽車模型@Data@Entity@Table(uniqueConstraints={  @UniqueConstraint(columnNames = {"date", "auctionNumber", "auctionId"})})public class Car {  @Id  @GeneratedValue  private UUID id;  private String date;  private int auctionId;  private int auctionNumber;  @OneToMany(mappedBy = "car", orphanRemoval = true, cascade={CascadeType.ALL})  private List<CarPhoto> photos;  public void addPhoto(CarPhoto photo) {    if (photos == null) {      photos = new ArrayList<CarPhoto>();    }    photos.add(photo);    photo.setCar(this);  }}汽車照片模型@Data@Entity@Table(name="car_photo")public class CarPhoto {  @Id  @GeneratedValue  private UUID id;  @Column(unique=true)  private String path;  @ManyToOne(fetch=FetchType.LAZY)  @JoinColumn(name="car_id", insertable=false, updatable=false)  private Car car;}Repository @Repository 公共接口 CarRepository 擴展 CrudRepository { }持久性...loop cardata {    Car car = new Car();    car.setAuctionId(cardata.auctionId);    car.setAuctionNumber(cardata.auctionNumber);    car.setDate(cardata.date);    Pattern.compile("#").splitAsStream(cardata.pictures).forEach(path - > {        CarPhoto photo = new CarPhoto();        photo.setPath(path);        car.addPhoto(photo);    });    cars.add(car);}carRepository.saveAll(cars);