hibernate 一对一 : AnnotationException Referenced property not a (One|Many)ToOne

Question

我已经完成了我的代码，就像在谷歌的例子中一样。我试图建立一对一的关系。但我收到错误:AnnotationException 引用的属性不是 (One|Many)ToOne

问题 : 怎么了？

@Entity
@Table(name = "filesInfo")
@Inheritance(strategy= InheritanceType.JOINED)
public class FileInfo {

    @Id
    @SequenceGenerator(name = "file_info_sequence", sequenceName = "sq_file_info")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "file_info_sequence")
    @Column(name = "id")
    private long fileID;

    @JsonIgnore
    @OneToOne(mappedBy="fileInfo", cascade=CascadeType.ALL, fetch = FetchType.LAZY)
    private FileContent fileContent;

    //......
}

@Entity
@Table(name="file_content")
public class FileContent{
    @Id
    @Column(name="id", unique=true, nullable=false)
    @GeneratedValue(generator="gen")
    @GenericGenerator(name="gen", strategy="foreign", parameters=@Parameter(name="property",       value="fileInfo"))
    private long fileID;

    @JsonIgnore
    @PrimaryKeyJoinColumn
    private FileInfo fileInfo;
    //....
}

错误:
java.lang.IllegalStateException:无法加载 ApplicationContext

引起:org.springframework.beans.factory.BeanCreationException:在 URL [file:src/test/resources/applicationContextTest.xml] 中定义名称为 'sessionFactory' 的 bean 创建错误:调用 init 方法失败；嵌套异常是 org.hibernate.AnnotationException: 引用的属性不是 (One|Many)ToOne: FileInfo.fileContent 的 mappingBy 中的 FileContent.fileInfo

引起:org.hibernate.AnnotationException:引用的属性不是(One|Many)ToOne:FileInfo.fileContent 的mappedBy 中的FileContent.fileInfo

......

Answer 1

答案是在 FileContent.fileInfo 字段中添加 @OneToOne 注释。