java - 引用的属性不是 (One|Many)ToOne : in mappedBy of

Question

我对 hibernate 还很陌生。我必须分类:相关的用户(父)和区域(子)，用户与区域具有 FK。我正在处理 hibernate 关系，但出现错误:

2020-05-31 12:39:53.442  WARN  --- [  restartedMain] ationConfigEmbeddedWebApplicationContext : Exception encountered

during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Referenced property not a (One|Many)ToOne: com.telefonica.npro.model.Area.id_area in mappedBy of com.telefonica.npro.model.User.area

这是用户:

    @Entity
@Table(name = "NPRO_USUARIOS")
public class User implements Serializable {

    private static final long serialVersionUID = -1330075515340995797L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @NotNull
    @Column
    private int id_usuario;

    @Column
    @NotNull
    private String nombre_usuario;


    @OneToOne(mappedBy = "id_sociedad", cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.DETACH, CascadeType.REFRESH })
    private Sociedad sociedad;


    @OneToOne(mappedBy = "id_area", cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.DETACH, CascadeType.REFRESH })
    private Area area;

    @Column
    @NotNull
    private String matricula_usuario;


    @Column
    @NotNull
    private String email_usuario;

    @ManyToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.DETACH, CascadeType.REFRESH })
    @JoinColumn(name="id_perfil")
    private Perfil perfil;

}

这是区域:

@Entity
@Table(name = "NPRO_MAESTRO_AREAS")
public class Area implements Serializable {

    private static final long serialVersionUID = -1330075515340995797L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @NotNull
    @Column
    private int id_area;

    @NotNull
    @Column
    private String nombre_area;

    @Column
    private LocalDateTime fecha_modif;
    @Column
    private String observaciones;
    @Column
    private int usuario_modif;
    @Column
    @NotNull
    private String activo;

    @ManyToOne
    @JoinColumn(name="id_sociedad")
    private Sociedad sociedad;

    @OneToOne
    @JoinColumn(name="id_usuario")
    private User user;
}

我不知道出了什么问题..提前致谢!

安东尼奥

Answer 1

mappedBy 应该是相关实体中可以导航回当前实体的字段。因此对于 User ，它应该是 Area 中的 user 字段:

@Entity
@Table(name = "NPRO_USUARIOS")
public class User implements Serializable {


     @OneToOne(mappedBy = "user", cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.DETACH, CascadeType.REFRESH })
     private Area area;
}