PersistentObjectException：在使用hashMap持久化对象时传递给持久化的分离实体

Question

我有一个类通知，它包含一个对象MessengerData：

public class Notification{

    @OneToOne(mappedBy = "messengerDataId")
    private MessengerData messengerData;
    ...
}

public class MessengerData{

        @OneToOne(mappedBy = "messengerData")
        private Notification notification;

        @OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.REMOVE },
                 fetch = FetchType.EAGER)
        @Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DETACH })
        @JoinTable(name = HemisTablesNames.MESSENGER_RESOURCES, joinColumns = @JoinColumn(name = "idResource"),
                 inverseJoinColumns = @JoinColumn(name = "messengerDataId"))

        private Map<String, Resource> resources = new HashMap<String, Resource>();
        ...

    @OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.REMOVE },
        fetch = FetchType.EAGER)
@Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DETACH })
@JoinTable(name = HemisTablesNames.MESSENGER_NOTIF_TEXT_DATA, joinColumns = @JoinColumn(name = "idNTD"),
        inverseJoinColumns = @JoinColumn(name = "idResource"))
private Map<String, NotificationTextData> textDatas;

EntityManager.persist(notification);
EntityManager.commitTransaction();

Answer 1

试着用这样的东西：

@ElementCollection(targetClass = String.class)
@CollectionTable(name = "MAP")
@MapKeyColumn(name="key")
@Column(name="value")
private Map<String, String> map;

您试图在没有引用的情况下持久化一个对象。也许那是你的问题。