我有以下3种型号:对象引用一个未保存的瞬态的实例 - 冲洗之前保存的瞬态的实例:春数据JPA
模型1:预订
@Entity
public class Reservation {
public static final long NOT_FOUND = -1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long id;
@OneToMany(mappedBy = "reservation", cascade = CascadeType.ALL, orphanRemoval = true)
public List<RoomReservation> roomReservations = new ArrayList<>();
}
模型2:客房预订:
public class RoomReservation extends{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long id;
@JsonIgnore
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "RESERVATION_ID")
public Reservation reservation;
@OneToMany(mappedBy = "roomReservation", cascade = CascadeType.ALL, orphanRemoval = true)
public List<GuestDetails> guestDetails = new ArrayList<>();
}
模型3:来宾详细介绍:
public class GuestDetails {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long id;
public Long guestId;
@JsonIgnore
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "ROOM_RESERVATION_ID")
public RoomReservation roomReservation;
public Boolean isPrimary;
@Transient
public Guest guest;
}
这三个之间的关系为:
预订 - 资助到许多关于RESERVATION_ID - >客房预订 - 资助到许多关于ROOM_RESERVATION_ID - >客户详细
我收到预约对象,并试图更新客人信息,我收到以下错误:
org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing : com.model.GuestDetails.roomReservation -> com.model.RoomReservation
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1760)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677)
at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:82)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517)
... 73 common frames omitted
我已经改变了的CascadeType为ALL中常见的问题,建议仍然得到同样的error.Please DONOT使其复制我试图realated这类问题的解决方案都已经问
请让我知道我在做什么错误。由于
代码通过改变GuestDetails保存预约对象:
Reservation existingReservation = reservationRepository.findOne(reservationId);
Reservation reservation = reservationParser.createFromJson(reservationNode);
existingReservation.roomReservations.forEach(roomReservation -> {
RoomReservation updatedRoomReservation = reservation.roomReservations.stream().filter(newRoomReservation -> Objects.equals(roomReservation.id, newRoomReservation.savedReservationId)).findFirst().orElse(null);
if(updatedRoomReservation != null){
roomReservation.guestDetails = updatedRoomReservation.guestDetails;
}
});
reservationRepository.save(existingReservation);
请发布实际上正在进行保存的代码 - 您试图保存什么类的类型? – PaulNUK
@PaulNUK我已经添加了代码块,我正在使用save.Please看看。 –
@PaulNUK嗨,任何更新..? –