此路由不支持PUT方法。支持的方法：GET，HEAD

Question

我正在尝试学习Laravel，并且正在遵循一系列名为laracast的教程。我在episode 24，“提交PUT请求的表单。简而言之，虽然表单方法设置为POST，但标记使用隐藏值将方法设置为PUT。不过，当我这样做时，我从标题中获取错误消息：

Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException 
The PUT method is not supported for this route. Supported methods: GET, HEAD.

从教程中，我希望POST也是受支持的方法。但是，当我尝试解决此问题时，我可以找到的所有资源都只是告诉我我已经知道的内容。不支持PUT，但是我可以伪造/覆盖它，然后它们指的是我已经完成的操作...是否还有其他原因导致我可能收到此错误消息？

HTML表单：

 <form method="POST" action="/competition-categories">
                @csrf
                @method('PUT')

                <div class="form-group row">
                    <label for="competition-category-name-input" class="col-4 col-form-label">Name</label>
                    <div class="col-8">
                        <input id="competition-category-name-input" name="competition-category-name-input" type="text" class="form-control" required="required" value="{{ $competitionCategory->name }}">
                    </div>
                </div>
                <div class="form-group row">
                    <label for="competition-category-abbreviation-input" class="col-4 col-form-label">Abbreviation</label>
                    <div class="col-8">
                        <input id="competition-category-abbreviation-input" name="competition-category-abbreviation-input" type="text" class="form-control" required="required" value="{{ $competitionCategory->abbreviation }}">
                    </div>
                </div>
                <div class="form-group row">
                    <div class="offset-4 col-8">
                        <button name="submit" type="submit" class="btn btn-primary">Submit</button>
                    </div>
                </div>
            </form>

web.php代码段：

//Competition Categories
Route::get('/competition-categories', 'CompetitionCategoryController@index');
Route::get('/competition-categories/create', 'CompetitionCategoryController@create');
Route::get('/competition-categories/{competitionCategory}', 'CompetitionCategoryController@show');
Route::get('/competition-categories/{competitionCategory}/edit', 'CompetitionCategoryController@edit');
Route::post('/competition-categories/{competitionCategory}', 'CompetitionCategoryController@store');
Route::put('/competition-categories/{competitionCategory}', 'CompetitionCategoryController@udpate');
Route::delete('/competition-categories/{competitionCategory}', 'CompetitionCategoryController@destroy');

来自控制器的代码段：

public function update(Request $request, CompetitionCategory $competitionCategory)
{
    $competitionCategory->update($this->validateCompetitionCategory());

    return redirect()->route('competition-categories' , [$competitionCategory]);
}

Answer 1

您忘记了表单中的ID，这应该可以解决您的问题：

action="/competition-categories/{{$competitionCategory->id}}"

Answer 2

最常见的情况是您的缓存。当您添加新路线或更改路线中的某些内容时，请始终在php artisan optimize之后运行以刷新缓存。

Answer 3

我建议使用命名路由以获取更多信息和消息，请参阅=>

https://laravel.com/docs/7.x/routing#named-routes