在复合键中使用JoinColumns时出现错误的类型描述符

我一直在b my我的头，试图找出以下映射中的错误。我知道以下映射对于ORM并不理想，但这就是数据库的原理，我无法更改其结构。我正在使用JPA 2.1和Hibernate 5.0.2.Final。在复合键中使用JoinColumns时出现错误的类型描述符

@MappedSuperclass  
public abstract class BaseEntity<T extends Serializable> implements Serializable { 

    protected T id; 

    @Id 
    public T getId() { 
     return id; 
    } 

    protected void setId(T id) { 
     this.id = id; 
    } 
}

@Table(name = "campaign") 
@AttributeOverride(name = "id", column = @Column(name = "campaign_id")) 
public class Campaign extends BaseEntity<String> { 
    // attributes, getters and setters 
}

@Embeddable 
public class CampaignBroadcastPK implements Serializable { 

    @ManyToOne 
    @JoinColumn(name = "campaign_id", insertable = false, updatable = false) 
    private Campaign campaign; 

    @Column(name = "broadcast_date") 
    private LocalDate broadcastDate; 

    // getters and setters 
}

@Entity 
@Table(name = "campaign_broadcast") 
public class CampaignBroadcast implements Serializable { 

    @EmbeddedId 
    private CampaignBroadcastPK id; 

    // attributes, getters and setters 
}

@Embeddable 
public class CampaignBroadcastProcessPK implements Serializable { 

    @ManyToOne 
    @JoinColumns({ 
     @JoinColumn(name = "campaign_id", insertable = false, updatable = false), 
     @JoinColumn(name = "broadcast_date", insertable = false, updatable = false) 
    }) 
    private CampaignBroadcast broadcast; 

    @Column(name = "process_date) 
    private LocalDate processDate; 

    // getters and setters 
}

@Entity 
@Table(name = "campaign_broadcast_process") 
public class CampaignBroadcastProcess implements Serializable { 

    @EmbeddedId 
    private CampaignBroadcastProcessPK id; 

    // attributes, getters and setters 
}

除了这个结构，我也有一个转换器来处理对LOCALDATE java.sql.Date，其注解为autoApply=true。

当我试图通过entityManager.find()加载CampaignBroadcastProcess，休眠试图campaign_id转换为日期，即使它映射为一个字符串，导致java.sql.Date抛出一个IllegalStateException，因为传递到valueOf字符串不是有效的日期字符串。

我很怀疑Hibernate正在混合CampaignBroadcastProcessPK上的JoinColumns类型，将它们作为LocalDate处理。

有人曾经遇到过这个问题吗？

来源

2015-10-19 renke

的乱序隐式映射，我也不清楚为什么，但改变两个@JoinColum的顺序解决问题。映射现在是如下：

@ManyToOne 
@JoinColumns({ 
    @JoinColumn(name = "broadcast_date", insertable = false, updatable = false), 
    @JoinColumn(name = "campaign_id", insertable = false, updatable = false)  
}) 
private CampaignBroadcast broadcast;

来源

2015-10-23 16:32:42 renke

这实际上是什么，我说的第一个数据类型 - 乱序隐式映射。考虑使用显式绑定而不是依靠来自注释的隐式顺序 –

不，它不是这样，因为即使使用referencedColumnName，映射也不起作用。 – renke

尝试添加明确referencedColumnName到您的@JoinColumn。你描述的错误可能是由于复合键列

@ManyToOne 
@JoinColumns({ 
    @JoinColumn(name = "campaign_id", referencedColumnName = "campaign_id", ...), 
    @JoinColumn(name = "broadcast_date", referencedColumnName = "broadcast_date", ...) }) 
private CampaignBroadcast broadcast;

来源

2015-10-22 23:37:26

-1

我想这是因为休眠拿起这是数据类型和映射它加入柱

来源

2015-10-29 10:14:59 user155806

在复合键中使用JoinColumns时出现错误的类型描述符

回答

相关问题