我是Spring引导和休眠的新手。在这里,我尝试运行基于搜索的可选参数查询,可以在其中按名称,国家/地区等进行搜索。如果我将此字段保留为空,则查询应全部列出。但是问题是我的方法返回所有数据而忽略了我的搜索参数。我的模型课看起来像
@Entity(name="MLFM_ORDER_OWNER")
public class ModelOrderOwner {
@Id @GenericGenerator(name = "custom_sequence", strategy =
"com.biziitech.mlfm.IdGenerator")
@GeneratedValue(generator = "custom_sequence")
@Column(name="ORDER_OWNER_ID")
private Long orderOwnerId;
@Column(name="OWNER_NAME")
private String ownerName;
@OneToOne
@JoinColumn(name="BUSINESS_TYPE_ID")
private ModelBusinessType businessTypeId;
@Column(name="SHORT_CODE")
private String shortCode;
@ManyToOne
@JoinColumn(name="OWNER_COUNTRY")
private ModelCountry ownerCountry;
// getter setter..
我的存储库界面看起来像
public interface OrderOwnerRepository extends
JpaRepository<ModelOrderOwner,Long>{
@Query("select a from MLFM_ORDER_OWNER a where a.businessTypeId.typeId=coalsec(:typeId,a.businessTypeId.typeId) and a.ownerCountry.countryId=coalsec(:countryId,a.ownerCountry.countryId) and a.ownerName LIKE %:name and a.shortCode LIKE %:code")
public List <ModelOrderOwner> findOwnerDetails(@Param("typeId")Long typeId,@Param("countryId")Long countryId,@Param("name")String name,@Param("code")String code);
}
这是我在控制器中的方法
@RequestMapping(path="/owners/search")
public String getAllOwner(Model model,@RequestParam("owner_name") String name,@RequestParam("shortCode") String code,
@RequestParam("phoneNumber") String phoneNumber,@RequestParam("countryName") Long countryId,
@RequestParam("businessType") Long typeId
) {
model.addAttribute("ownerList",ownerRepository.findOwnerDetails(typeId, countryId, name, code));
return "data_list";
}
在这方面有人可以帮助我吗?好吗?
答案 0 :(得分:2)
不知道如何,但是下面的代码对我有用
@Query("select a from MLFM_ORDER_OWNER a where a.businessTypeId.typeId=COALESCE(:typeId,a.businessTypeId.typeId) and a.ownerCountry.countryId=COALESCE(:countryId,a.ownerCountry.countryId) and a.ownerName LIKE %:name and a.shortCode LIKE %:code")
public List <ModelOrderOwner> findOwnerDetails(@Param("typeId")Long typeId,@Param("countryId")Long countryId,@Param("name")String name,@Param("code")String code);
并在控制器中
@RequestMapping(path="/owners/search")
public String getAllOwner(Model model,@RequestParam("owner_name") String name,@RequestParam("shortCode") String code,
@RequestParam("phoneNumber") String phoneNumber,@RequestParam("countryName") Long countryId,
@RequestParam(value = "active", required = false) String active, @RequestParam("businessType") Long typeId
) {
if(typeId==0)
typeId=null;
if(countryId==0)
countryId=null;
model.addAttribute("ownerList",ownerRepository.findOwnerDetails(typeId, countryId, name, code, status));
return "data_list";
}
答案 1 :(得分:1)
JPQL不支持可选参数。 在JPQL中没有简单的方法可以做到这一点。您将必须使用 OR 运算符编写多个 WHERE 子句。
请参考以下答案以回答类似的问题:Answer 1和Answer 2
PS:您可能希望针对您的用例来研究Query by Example。它支持处理空参数。
答案 2 :(得分:0)
使用 JpaSpecificationExecutor
//import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
第 1 步:在您的 JPA 存储库中实现 JpaSpecificationExecutor
例如:
public interface TicketRepo extends JpaRepository<Ticket, Long>, JpaSpecificationExecutor<Ticket> {
第 2 步现在要根据可选参数获取票证,您可以使用 CriteriaBuilder 构建规范查询
例如:
public Specification<Ticket> getTicketQuery(Integer domainId, Calendar startDate, Calendar endDate, Integer gameId, Integer drawId) {
return (root, query, criteriaBuilder) -> {
List<Predicate> predicates = new ArrayList<>();
predicates.add(criteriaBuilder.equal(root.get("domainId"), domainId));
predicates.add(criteriaBuilder.greaterThanOrEqualTo(root.get("createdAt"), startDate));
predicates.add(criteriaBuilder.lessThanOrEqualTo(root.get("createdAt"), endDate));
if (gameId != null) {
predicates.add(criteriaBuilder.equal(root.get("gameId"), gameId));
}
return criteriaBuilder.and(predicates.toArray(new Predicate[0]));
};
}
第 3 步:将 Specification 实例传递给 jpaRepo.findAll(specification),它将返回您的实体对象列表(运行示例中的票证)
ticketRepo.findAll(specification); // Pass output of function in step 2 to findAll