Spring boot：Query方法中可选参数查询

Question

我是 Spring Boot 和 Hibernate 的新手。在这里，我尝试运行基于搜索的可选参数查询，我可以按名称、国家/地区等进行搜索。如果我将此字段保留为空，则查询应该全部列出。但问题是我的方法返回所有数据，忽略我的搜索参数。我的模型类看起来像

@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";
    }

任何人都可以在这方面帮助我吗？请？

Answer 1

现在回答也太晚了，但是对于任何寻找解决方案的人来说，还有一个更简单的方法，如下所示：

就我而言，我的控制器就像：

@RestController
@RequestMapping("/order")
public class OrderController {

    private final IOrderService service;

    public OrderController(IOrderService service) {
        this.service = service;
    }

    @RequestMapping(value = "/{username}/", method = RequestMethod.GET)
    public ResponseEntity<ListResponse<UserOrdersResponse>> getUserOrders(
            @RequestHeader Map<String, String> requestHeaders,
            @RequestParam(required=false) Long id,
            @RequestParam(required=false) Long flags,
            @RequestParam(required=true) Long offset,
            @RequestParam(required=true) Long length) {
        // Return successful response
        return new ResponseEntity<>(service.getUserOrders(requestDTO), HttpStatus.OK);
    }
}

正如您所看到的，我有Usernameas@PathVariable和length，offset哪些是我必需的参数，但我接受id和flags用于过滤搜索结果，因此它们是我的可选参数，对于调用 REST 服务不是必需的。

现在，在我的存储库层中，我刚刚创建了@Query如下内容：

@Query("select new com.ada.bourse.wealth.services.models.response.UserOrdersResponse(FIELDS ARE DELETED TO BECOME MORE READABLE)" +
        " from User u join Orders o on u.id = o.user.id where u.userName = :username" +
        " and (:orderId is null or o.id = :orderId) and (:flag is null or o.flags = :flag)")
Page<UserOrdersResponse> findUsersOrders(String username, Long orderId, Long flag, Pageable page);

就是这样，您可以看到我用(:orderId is null or o.id = :orderId)and检查了我的可选参数(:flag is null or o.flags = :flag)，我认为需要强调的是，我用条件而不是我的列数据检查了我的参数，is null所以如果客户端为我发送Id和flags参数，我将用它们过滤结果否则我只是查询username哪个是我的@PathVariable。