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我正在开发一个简单的 Spring-Boot CRUD 应用程序，我正在尝试使用 CrudRepository 更新或创建新实体实例并保存它们，但我不断收到 (type=Bad Request, status=400) 错误，但我真的没有任何验证，我不知道可能是错误，我正在使用旧版本的 spring-boot 来实现旧的 Java 兼容性，因为我将部署应用程序的服务器。这是我的实体

@Entity
@Table(name = "AAA_TEST_DM_DATA")
public class DataDM implements Serializable{

    @OneToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ID_TIENDA")
    private Tienda tienda;

    @Column(name = "NIVEL_NSE")
    private String nse;

    @Column(name = "GENERADOR_PRINCIPAL")
    private String generadorUno; 

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    @Column(name = "DATA_ID")
    private Long id;

这是我扩展 CrudRepository 的 Dao 或 repo

public interface IDataDMDao extends CrudRepository <DataDM, Long> {

    DataDM findByTienda(Tienda tienda);
    
}

这是我的服务

public interface IDataDMService {

    public List<DataDM> findAll();

    public DataDM findOne(Long id);

    public void save(DataDM dataDM);

    public boolean exists(Tienda tienda);

    public DataDM findDm(Tienda tienda);

    
}

这是服务实现

@Service
public class IDataDMServiceImp implements IDataDMService {

    @Autowired
    private IDataDMDao dataDMDao;


    @Override
    @Transactional(readOnly = true)
    public List<DataDM> findAll(){
        return (List<DataDM>) dataDMDao.findAll();
    }

    @Override
    @Transactional(readOnly = true)
    public DataDM findOne(Long id){
        return dataDMDao.findOne(id);
    }

    @Override
    @Transactional
    public void save(DataDM data){
        dataDMDao.save(data);
    }
    
    @Override
    @Transactional(readOnly = true)
    public boolean exists(Tienda tienda){
        
        if (dataDMDao.findByTienda(tienda) == null){
            return false;
        } else {
            return true;
        }
    }

    @Override
    @Transactional(readOnly = true)
    public DataDM findDm(Tienda tienda){
        return dataDMDao.findByTienda(tienda);
    }
}

这是控制器

@SessionAttributes("data")
public class DesController {

    @Autowired
    private ITiendaService tiendaService;

    @Autowired
    private IDataDMService dataService;

    @Autowired
    private ISesionTiendaService sesionService;


    //LOOK AT ALL DATADM
    @RequestMapping("/data")
    public String dataList(Model model){
        model.addAttribute("title", "Datos de tiendas");
        model.addAttribute("dataList", dataService.findAll());
        return "datas";

    }


    @RequestMapping("/captura")
    public String form(Model model, 
    @RequestParam(value = "_paramsP_ID") String idsesion,
    HttpServletRequest request){

        Integer idses = Integer.parseInt(request.getParameter("_paramsP_ID"));

        //get tiendaid based on idses
        SesionTienda sesion = sesionService.findSesion(idses, "FLT_TIENDA");
        Integer id = Integer.parseInt(sesion.getValor());

        //get tienda based on given id, then checks if there is data for that tienda
        Tienda tienda = tiendaService.findOne(id);
        boolean check = dataService.exists(tienda); 
        DataDM data = null;

         //if there is no data create new data entity for that tienda
         if (check == false){

            data = new DataDM();
            data.setTienda(tienda);
            //dataService.save(data);
            model.addAttribute("data", data);
            model.addAttribute("title", "Tiendas form");
            return "form";

        }

        //if there is data, find it and pass it into the model
        data = dataService.findDm(tienda);
        model.addAttribute("data", data);
        model.addAttribute("title", "Tiendas form");
        return "form";        
    }

    //Saves the DataDM entity from the form
    @RequestMapping(value = "/form", method = RequestMethod.POST)
    public String save(Model model, DataDM data, SessionStatus status)
    {
        dataService.save(data);
        status.setComplete();
        return "redirect:/success";
    }

从给定的参数中，我得到 Tienda id，使用该 ID，我想查看是否是该 Tienda 的 DataDM 实例，如果存在，则使用表单更新它，如果没有实例，则创建并保存它，一切正常（findByTienda 有效）直到我单击表单中的保存按钮，它给了我错误：（类型=错误请求，状态=400）。对象 ='dataDM' 的验证失败。错误计数：1，但我真的没有任何验证来保存 DataDM 实体，我想它必须与 save() 方法有关，但我不知道可能是什么，有人可以帮助我吗？

编辑：添加客户端代码

    <!DOCTYPE html>
<html lang="en" xmlns:th="/http:wwww.thymeleaf.org">
<head th:replace="layout/layout :: head"></head>
<body>
<header th:replace="layout/layout :: header"></header>
    
    <div class="container">

        <h3 th:text=" 'CAPTURA PARA TIENDA ' + ${data.tienda.id} + ' ' + ${data.tienda.nombreTienda} "></h3>

        <div class="container">

            <form th:action="@{/form}" th:object="${data}" method="post" class="d-flex align-content-start flex-wrap p-2">

                <label for="sec-1" class="h4" th:text=" 'ALREDEDORES DE TIENDA' "></label>
                <div class="d-flex align-content-start flex-wrap" id="sec-1" name="sec-1" >
                    <div class="form-group p-2">
                        <select th:field="*{nse}" id='nse' name="nse" class="form-control">
                            <option th:value=" '-' "  th:text=" '-' "></option>
                            <option th:value=" 'AB' " th:text=" 'AB' "></option>
                            <option th:value=" 'C+' " th:text=" 'C+' "></option>
                            <option th:value=" 'C' "  th:text="  'C' "></option>
                            <option th:value=" 'C-' " th:text=" 'C-' "></option>
                            <option th:value=" 'D' "  th:text="  'D' "></option>
                        </select>
                    </div>
                <div class="form-group p-2">
                <input type="submit" value="Guardar Datos" class="btn btn-secondary btn-block" />
                </div>

                <input type="hidden" th:field="*{id}"/>
                <input type="hidden" th:field="*{tienda}"/>
                </form>
</div>
4

1 回答 1

1

Bad Request 意味着服务器无法处理请求（因此您的服务器代码无法运行），通常意味着存在客户端错误，因此您应该检查您的客户端代码...

编辑：默认情况下，保存方法需要 JSON，因此您可以发送 JSON，但它涉及添加 JavaScript，或者您可以告诉您的 API 方法使用不同类型的数据，如下所示：

@PostMapping(
  path = "/save",
  consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE})
于 2022-01-26T21:21:42.923 回答