JPA,Hibernate中,一對多映射問題JPA,Hibernate中,一對多映射
由於父:
@Entity
public class Discount {
@Id
private String id;
@Column(nullable = false)
private String userName;
@Column(nullable = false)
private String iDocId;
@Column(nullable = false)
private Date creationTime;
@Column(nullable = false)
private String salesOrganization;
.........
@OneToMany(cascade = CascadeType.ALL, mappedBy = "discount")
private Set<DiscountConditionScale> conditionScales = new HashSet<DiscountConditionScale>();
.........
}
和兒童:
@Entity
public class DiscountConditionScale {
@Id
@ManyToOne
private Discount discount;
private BigDecimal quantity;
private BigDecimal rate;
.......
}
我會l ike擁有DiscountConditionScale的關鍵(折扣,費率,數量)。我如何實現這一目標?
非常感謝
非常感謝!這就是訣竅! – Marcin 2013-05-07 15:23:16