我遇到了一个与此非常相似的问题:How do I join tables on non-primary key columns in secondary tables? 但我不确定是否可以应用相同的解决方案。如何使用外键将两个表映射到一个实体?
我有两个表像这样:
CREATE TABLE CUSTOMER
(
CUSTOMER_ID INTEGER NOT NULL,
DETAIL_ID INTEGER NOT NULL,
PRIMARY KEY(CUSTOMER_ID),
CONSTRAINT cust_fk FOREIGN KEY(DETAIL_ID) REFERENCES DETAILS(DETAIL_ID)
)
CREATE TABLE DETAILS
(
DETAIL_ID INTEGER NOT NULL,
OTHER INTEGER NOT NULL,
PRIMARY KEY(DETAIL_ID)
)
我想这些表映射到称为Customer
一个类,所以我有:
@Entity
@Table(name = "CUSTOMERS")
@SecondaryTable(name = "DETAILS", [email protected](name="DETAIL_ID"))
public class Customer {
@Id
@GeneratedValue
@Column(name = "CUSTOMER_ID")
private Integer id;
@Column(table = "DETAILS", name = "OTHER")
private Integer notes;
// ...
}
,但是这只有当DETAIL_ID
匹配主表中的CUSTOMER_ID
。
所以我的问题是:我如何在我的主表中使用外键字段加入辅助表的主键?
UPDATE 我试图设置:
@SecondaryTable(name = "DETAILS", [email protected](name="DETAIL_ID", referencedColumnName="DETAIL_ID"))
但是当我运行的应用程序,我得到这个异常:
org.hibernate.MappingException: Unable to find column with logical name: DETAIL_ID in org.hibernate.mapping.Table(CUSTOMERS) and its related supertables and secondary tables
好的,所以你有两张桌子,你想把它们加入一张桌子吗? –
@SerenityStackHolder是的,我想要在单个实体上映射两个表。但是我在辅助表的主表中有一个外键。 – davioooh