[英]Composite keys using IdClass on Hibernate for composite keys when using DataJpaTest
我有这样的 JPA class
@Data
@Entity
@Table(name = "oss_org_discount")
@IdClass(OrganizationDiscountPK.class)
public class OrganizationDiscount {
@Id
@OneToOne(fetch = FetchType.LAZY)
@EqualsAndHashCode.Exclude
@JoinColumn(name = "Org")
@ToString.Exclude
private Organization organization;
@EqualsAndHashCode.Include
@ToString.Include
private String getOrganizationId() {
return organization.getId();
}
@Id
@Column(name = "Discount")
private String discountId;
private String active;
@Contract(pure = true)
public boolean isActive() {
return "Y".equals(active);
}
public void setActive(final boolean active) {
this.active = active ? "Y":"";
}
}
和一个 IdClass。
@Data
public class OrganizationDiscountPK implements Serializable {
private Organization organization;
private String discountId;
}
当我查看日志时,我看到生成了以下内容。
Hibernate: alter table oss_org_discount add constraint UK_ecc64ehkc31t6kf0hcdwj1tvi unique (org)
我的问题是,它不应该显示类似
Hibernate: alter table oss_org_discount add constraint UK_ecc64ehkc31t6kf0hcdwj1tvi unique (org, discount)
不确定这是我的错误还是 Hibernate 中的错误。
我确实看到了这个...
Hibernate: create table oss_org_discount (discount varchar(255) not null, active varchar(255), org varchar(255) not null, primary key (discount, org))
所以另一个问题是为什么要创建一个唯一的约束?
问题是Organization
上的OneToOne
。 应该是@ManyToOne
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