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我遇到麻煩保存一個複合主鍵使用Hibernate 3.3和註釋的對象。休眠與數據庫生成的時間戳複合關鍵
我的密鑰由用戶的唯一ID和數據庫生成時間戳組成。
如何使用註釋映射此密鑰?我使用了一些反向工程工具,但是當我嘗試保存實體時遇到了問題。
例子:
@Entity
@Table(name = "ACTIVITY_LOG", schema = "WEB")
public class ActivityLog implements java.io.Serializable {
// Fields
private ActivityLogId id;
private SearchAuditRecord searchAuditRecord;
// Constructors
.....
// Property accessors
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "identifier", column = @Column(name = "IDENTIFIER", nullable = false, length = 11)),
@AttributeOverride(name = "createTimestamp", column = @Column(name = "CREATE_TIMESTAMP", insertable=false, updatable=false, nullable = false, length = 26)) })
public ActivityLogId getId() {
return this.id;
}
public void setId(ActivityLogId id) {
this.id = id;
}
.....
}
@Embeddable
public class ActivityLogId implements java.io.Serializable {
// Fields
private String identifier;
private Date createTimestamp;
// Constructors
/** default constructor */
public ActivityLogId() {
}
/** full constructor */
public ActivityLogId(String hrmisIdentifier, Date createTimestamp) {
this.identifier = identifier;
this.createTimestamp = createTimestamp;
}
// Property accessors
@Column(name = "IDENTIFIER", nullable = false, length = 11)
public String getIdentifier() {
return this.identifier;
}
public void setIdentifier(String identifier) {
this.identifier = identifier;
}
@Column(name = "CREATE_TIMESTAMP",insertable= false, updatable= false, nullable = false, length = 26)
public Date getCreateTimestamp() {
return this.createTimestamp;
}
public void setCreateTimestamp(Timestamp createTimestamp) {
this.createTimestamp = createTimestamp;
}
}
我想我需要告訴Hibernate正由數據庫中創建ActivityLogID.createTimestamp ...但我不知道怎麼樣。
因爲它站在現在,當我嘗試保存對象的論文,我得到:
org.hibernate.exception.ConstraintViolationException:
could not insert: [ca.gc.rcmp.persistence.ActivityLog]........
Caused by: com.ibm.db2.jcc.am.fo: DB2 SQL Error: SQLCODE=-407, SQLSTATE=23502, SQLERRMC= , DRIVER=3.57.82
這是告訴我,我不能把一個空到非空列。 CreateTimestamp是我的實體中唯一的爲空的字段。
任何意見將不勝感激。
謝謝!