jpa-2.0 - 如何在单个 POJO 中添加多个 ManyToOne 映射并从多个表中获取记录？

Question

我有表 Order(orderno,orderdate,suppid) Supplier(suppid,suppname) orderdetails(orderdetailid,orderno) 如何使用 JPA orderno,orderdate,suppname,orderdetailid 获得这样的结果？

Answer 1

@ManyToOne
    @Fetch(FetchMode.JOIN)
    @JoinColumn(name="suppid",nullable=false,insertable=false,updatable=false)
    private Supplier supplierDetails;


    This will Join  one table to another and fetch the record for you.This code should be inside Order table POJO. and getter setter of supplier details as well.