Question

我的问题：我有抽象的C类，我试图得到一对多的关系：

@OneToMany(cascade = CascadeType.ALL,fetch = FetchType.LAZY,mappedBy = "abstractAttachmentObject",targetEntity=Attachment.class)

但我明白了：

org.hibernate.AnnotationException: @OneToOne or @ManyToOne on ********.attachmentObject references an unknown entity: *****************.AbstractAttachmentObject

我尝试过较旧帖子的不同答案，但有人总结说hibernate并不支持这一点。这个问题现在解决了吗？

代码很长，但我可以解释一下这个主要思想：我有一个名为abstractAttacmentObject的抽象类，它有另外两个继承它的类A和B.这个抽象类应该与类Attachment有一个关系（一对多），其中这些类的一个对象可以有很多附件

`

 @MappedSuperclass
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public abstract class AbstractAttachmentObject extends BaseEntity implements AttachmentObject{

    @OneToMany(cascade = CascadeType.ALL,fetch = FetchType.LAZY,mappedBy = "abstractAttachmentObject",targetEntity=Attachment.class)
    private List<Attachment> attachments ;
}


@Entity
@Table(name="ATTACHMENT")
public class Attachment extends BaseEntity{
    @ManyToOne
    @JoinColumn(name="attachment_object_id")
    private AbstractAttachmentObject abstractAttachmentObject;
}

`

Hibernate：@OneToMany（mappedby =＆＃34; abstractClass＆＃34;）不起作用

0 个答案: