Question

我在电影服务的数据库中设计了一个表系统。到目前为止，我已经以这种方式设计了它们。

@Entity
@Table(name = "movies")
@Data
public class MovieEntity {

    @Id
    @Column(unique = true, updatable = false)
    @GeneratedValue
    private Long id;

    @OneToMany(mappedBy = "movie", cascade = CascadeType.ALL)
    private Set<MovieDescription> description;
}

@Entity
@Table(name = "movies_info")
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "type")
public abstract class MovieInfo {

    @Id
    @Column(unique = true, updatable = false)
    @GeneratedValue
    private Long id;

    @ManyToOne
    public MovieEntity movie;
}

@Entity
@DiscriminatorValue(value = EditType.Values.DESCRIPTION)
public class MovieDescription extends MovieInfo {

    private String description;
    private String language;
}

编译时，它给我发错了

Caused by: org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: com.core.jpa.entity.MovieDescription.movie in com.core.jpa.entity.MovieEntity.description

与MovieEnity映射有关的东西，但我不知道它是什么。

Answer 1

使用targetEntity属性来定位要映射的超类字段。

/give @p stick 1 0 {ench:[{"id":3,"lvl":3}]}

更多细节：one to many mapping to a property of superclass

MappedBy引用未知的目标实体

1 个答案: