使用org.hibernate.MappingException注释

Question

我使用JPA注解这两个类：

@Entity 
@RooJavaBean 
@RooToString 
@RooEntity 
@MappedSuperclass 
public abstract class BaseEntity { 

    @Temporal(TemporalType.TIMESTAMP) 
    @DateTimeFormat(style = "S-") 
    private Calendar created; 

    @Temporal(TemporalType.TIMESTAMP) 
    @DateTimeFormat(style = "S-") 
    private Calendar updated; 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "id") 
    private Long id; 

    @Version 
    @Column(name = "version") 
    protected Integer version; 

    public Long getId() { 
    return id; 
    } 

    public void setId(Long id) { 
    this.id = id; 
    } 

    public Integer getVersion() { 
    return version; 
    } 

    public void setVersion(Integer version) { 
    this.version = version; 
    } 

    @PrePersist 
    protected void onCreate() { 
    created = Calendar.getInstance(); 
    } 

    @PreUpdate 
    protected void onUpdate() { 
    updated = Calendar.getInstance(); 
    } 

} 
@Entity 
@RooJavaBean 
@RooToString 
@RooEntity 
public class Event extends BaseEntity { 

    private Score challenger; 
    private Score defender; 
    ... 
} 

@Entity 
@RooJavaBean 
@RooToString 
@RooEntity 
public class Score extends BaseEntity { 

    @ManyToOne 
    private Team team; 
    private Event event; 
    private Integer score; 
    private Boolean accepted; 
} 

我得到只有一个例外：

Caused by: org.hibernate.MappingException: Could not determine type for: edu.unlv.cs.ladders.entities.Score, at table: event, for columns: [org.hibernate.mapping.Column(challenger)] 
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:269) 
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253) 
at org.hibernate.mapping.Property.isValid(Property.java:185) 
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:440) 
at org.hibernate.mapping.RootClass.validate(RootClass.java:192) 
at org.hibernate.cfg.Configuration.validate(Configuration.java:1108) 
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1293) 
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859) 
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669) 

这是否具有由具有两个独立的领域做访问相同的类？我是否必须更具描述性，并指定列名或什么？

Answer 1

您需要使用ManyToOne或OneToOne注释Score属性。