我有一个产品类，其中有一个@OneToMany关联列表的买家。我想要做的是当我搜索产品时由关联执行的买方搜索，对Buyer表的结束日期列使用空约束。如何在下面的列表映射中执行此操作。
// it would be something I needed cri.createCriteria("listaBuyer", "buyer).add(Restriction.isNull("finalDate"));
示例
注册数据
product code | initial date | final date |
-------------------------------------------------------
1 | 2016-28-07 | 2017-28-07 |
------------------------------------------------------
2 | 2016-10-08 | 2017-28-07 |
------------------------------------------------------
3 | 2017-28-08 | |
-----------------------------------------------------
4 | 2017-30-08 | |
产品类
public class Product {
@OneToMany(targetEntity=Buyer.class, orphanRemoval=true, cascade={CascadeType.PERSIST,CascadeType.MERGE}, mappedBy="product")
@LazyCollection(LazyCollectionOption.FALSE)
public List<Buyer> getListaBuyer() {
if (listaBuyer == null) {
listaBuyer = new ArrayList<Buyer>();
}
return listaBuyer;
}
建立标准
Criteria cri = getSession().createCriteria(Product.class);
cri.createCriteria("status", "sta");
cri.add(Restrictions.eq("id", Product.getId()));
return cri.list();
预期结果
product code | initial date | final date |
-------------------------------------------------------
3 | 2017-28-08 | |
-----------------------------------------------------
4 | 2017-30-08 | |
返回结果
product code | initial date | final date |
-------------------------------------------------------
1 | 2016-28-07 | 2017-28-07 |
------------------------------------------------------
2 | 2016-10-08 | 2017-28-07 |
------------------------------------------------------
3 | 2017-28-08 | |
-----------------------------------------------------
4 | 2017-30-08 | |