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Accepted
Денис Короленко
Asked:2022-07-04 20:51:30 +0000 UTC2022-07-04 20:51:30 +0000 UTC

Bean 名称“adDto”的 BindingResult 和普通目标对象都不能用作请求属性

  • 772

应用程序找不到与表单上指定的属性匹配的对象。我是新来的。我会很感激！

控制器：

    @GetMapping("/ads/{id}/edit")
public String adEdit(@PathVariable(value = "id") int id, Model model) {
    List<Platform> platforms = platformRepository.findAll();
    Ad ad = adRepository.findById(id).orElseThrow(() ->
            new ResponseStatusException(HttpStatus.NOT_FOUND,
                    "Ad having id " + id + " not found"));
    model.addAttribute("platforms", platforms);
    model.addAttribute("ad",ad);
    return "ad-edit";
}

@PostMapping("/ads/{id}/edit")
public String adUpdate(@PathVariable(value = "id") int id, @RequestBody AdDTO adDto,
                       Model model) {
    Ad ad = adRepository.findById(id).orElseThrow(() ->
            new ResponseStatusException(HttpStatus.NOT_FOUND,
                    "Ad having id " + id + " not found"));
    ad.setPlatforms((platformRepository.findAllById(adDto.platformsIds)));
    ad.setName(adDto.getName());
    ad.setAssetUrl(adDto.getAssetUrl());
    adRepository.save(ad);
    return "redirect:/ads";
}

ATT：

public class AdDTO {
public int id;
public String name;
public String assetUrl;
public Status status;
public Campaign campaign;
public Set<Integer> platformsIds;

HTML：

<!DOCTYPE html>
<html>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet"
      integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">
<link rel="stylesheet" href="/css/style.css"/>
<head>
    <meta charset="UTF-8">
    <title>Редактирование обьявления</title>
</head>
<body>
<header>
    <nav class="navbar navbar-light bg-light">
        <form class="container justify-content-start">
            <h3 class="caption">Редактирование обьявления <span th:text="${ad.name}"></span></h3>
            <button class="navbar-toggler" type="button">
                <a href="../home.html" th:href="@{/home}">На главную</a></button>
            <button type="button" class="btn btn-light">
                <a href="../info.html" th:href="@{/info}">Обе SQL Таблицы</a></button>
            <button type="button" class="btn btn-light">
                <a href="../ads.html" th:href="@{/ads}">Обьявления</a></button>
            <button type="button" class="btn btn-light">
                <a class="link" href="../campaigns.html" th:href="@{/campaigns}">Кампании</a></button>
        </form>
    </nav>
</header>
<!--<div th:object="${adDto}"  class="container justify-content-start">-->
    <form th:object="${adDto}" th:action="@{/ads/{id}/edit}" method="post">
        <input type="text" th:value="${ad.name}" th:field="*{adDto.name}"

               placeholder="Введите название обьявления" class="form-control">

        <input type="text" th:value="${ad.assetUrl}" th:field="*{adDto.assetUrl}"

               placeholder="Введите ссылку на рекламу" class="form-control">
        <!--        <h6>id кампании </h6> <h6 th:value="${el.campaign.id}"></h6>-->
        <select class="form-control" th:field="*{adDto.platformsIds}" multiple="multiple">
            <div> <option th:each="platform : ${platforms}"
                    th:value="${platform.id}"
                    th:text="${platform.name}"
                    th:selected="${adDto.platformsIds.contains(platform.id)}">
            </option> </div>
        </select>
        <button type="submit" class="btn btn-success">Редактировать</button>
    </form>
<!--</div>-->
</body>
</html>

在此处输入图像描述

spring-mvc

1 个回答

  1. Best Answer

    @RequestBody 在使用 @RestController 和 Spring 构建 REST API 时使用。使用 Thymeleaf 时，需要带上@Controller 并应用@ModelAttribute。

    在 @GetMapping 方法中，您需要添加从 Ad 对象创建的 AdDTO 实例，如下所示：

    @GetMapping("/ads/{id}/edit")
public String adEdit(@PathVariable(value = "id") int id, Model model) {
    List<Platform> platforms = platformRepository.findAll();
    Ad ad = adRepository.findById(id).orElseThrow(() ->
            new ResponseStatusException(HttpStatus.NOT_FOUND,
                    "Ad having id " + id + " not found"));
    model.addAttribute("platforms", platforms);
    model.addAttribute("adDto", mapToDto(ad)); // <-- changed line here
    return "ad-edit";
}

    对于@PostMapping，使用@ModelAttribute：

    @PostMapping("/ads/{id}/edit")
public String adUpdate(@PathVariable(value = "id") int id, @ModelAttribute("adDto") AdDTO adDto,
                       Model model) {
    Ad ad = adRepository.findById(id).orElseThrow(() ->
            new ResponseStatusException(HttpStatus.NOT_FOUND,
                    "Ad having id " + id + " not found"));
    ad.setPlatforms((platformRepository.findAllById(adDto.platformsIds)));
    ad.setName(adDto.getName());
    ad.setAssetUrl(adDto.getAssetUrl());
    adRepository.save(ad);
    return "redirect:/ads";
}
    • 0

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