在複合鍵中使用JoinColumns時出現錯誤的類型描述符

我一直在b my我的頭，試圖找出以下映射中的錯誤。我知道以下映射對於ORM並不理想，但這就是數據庫的原理，我無法更改其結構。我正在使用JPA 2.1和Hibernate 5.0.2.Final。在複合鍵中使用JoinColumns時出現錯誤的類型描述符

@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 
}

除了這個結構，我也有一個轉換器來處理對LOCALDATE java.sql.Date，其註解爲autoApply=true。

當我試圖通過entityManager.find()加載CampaignBroadcastProcess，休眠試圖campaign_id轉換爲日期，即使它映射爲一個字符串，導致java.sql.Date拋出一個IllegalStateException，因爲傳遞到valueOf字符串不是有效的日期字符串。

我很懷疑Hibernate正在混合CampaignBroadcastProcessPK上的JoinColumns類型，將它們作爲LocalDate處理。

有人曾經遇到過這個問題嗎？

來源

2015-10-19 renke

的亂序隱式映射，我也不清楚爲什麼，但改變兩個@JoinColum的順序解決問題。映射現在是如下：

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

來源

2015-10-23 16:32:42 renke

這實際上是什麼，我說的第一個數據類型 - 亂序隱式映射。考慮使用顯式綁定而不是依靠來自注釋的隱式順序 –

不，它不是這樣，因爲即使使用referencedColumnName，映射也不起作用。 – renke

嘗試添加明確referencedColumnName到您的@JoinColumn。你描述的錯誤可能是由於複合鍵列

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

來源

2015-10-22 23:37:26

-1

我想這是因爲休眠拿起這是數據類型和映射它加入柱

來源

2015-10-29 10:14:59 user155806

在複合鍵中使用JoinColumns時出現錯誤的類型描述符

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