java - 实体更新导致错误: cascade ="all-delete-orphan" was no longer referenced by the owning entity

Question

我有以下表实体，因为我正在尝试更新现有记录，但这样做时出现以下错误。我知道我在实体定义中犯了一些错误，但无法弄清楚。 感谢您的帮助。

                **A
        -------------------
        |                 |
        B                 C
                      ---------
                      |       |
                      D       E**

@Entity
@Table()
public class A {
    @Id
    Long id;

    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval=true)
    @JoinColumn(name = "id", referencedColumnName="id",  nullable = false)
    private Set<B> b;

    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval=true)
    @JoinColumn(name = "id", referencedColumnName="ID",  nullable = false)  
    private Set<C> c;
}

@Entity
@Table()
public class B{
    @Id
    Long id;
}

@Entity
@Table()
public class C{
    @Id
    Long id;
    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval=true)
    @JoinColumn(name = "id", referencedColumnName="id",  nullable = false)
    private Set<D> D;

    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval=true)
    @JoinColumn(name = "id", referencedColumnName="ID",  nullable = false)  
    private Set<E> E;
}

@Entity
@Table()
public class D{
    @Id
    Long id;
}

@Entity
@Table()
public class E{
    @Id
    Long id;
}

错误:

org.hibernate.HibernateException:具有cascade =“all-delete-orphan”的集合不再被拥有的实体实例引用:com.entity.C.D

at org.hibernate.engine.internal.Collections.processDereferencedCollection(Collections.java:100) ~[hibernate-core-5.3.12.Final.jar:5.3.12.Final]
at org.hibernate.engine.internal.Collections.processUnreachableCollection(Collections.java:51) ~[hibernate-core-5.3.12.Final.jar:5.3.12.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.flushCollections(AbstractFlushingEventListener.java:262) ~[hibernate-core-5.3.12.Final.jar:5.3.12.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:95) ~[hibernate-core-5.3.12.Final.jar:5.3.12.Final]

Answer 1

在保存模式下，您只需将列表设置为实体即可， 但在更新模式下首先需要清除实体的List，然后将List添加到其中，不要设置List，

处于保存模式=>

person.setAddress(addressList);

处于更新模式=>

person.getAddress().clear();
person.getAddress().addAll(updatedAddressList);