laravel-5 - Laravel Route 模型绑定(bind) - 空用户

Question

我有路线

http://192.168.10.15/user/33/edit

我正在尝试根据 url id 返回用户。

  public function edit($id, \App\User $user)
    {
        dd($user->id);
         return view('user.update');

    }

id返回null，我该怎么做？

Answer 1

要使路由绑定(bind)起作用，您应该使类型提示的变量名称与路由段名称匹配，如文档所需的那样:

Laravel automatically resolves Eloquent models defined in routes or controller actions whose type-hinted variable names match a route segment name. For example:

Route::get('api/users/{user}', function (App\User $user) {
return $user->email; });

Since the $user variable is type-hinted as the App\User Eloquent model and the variable name matches the {user} URI segment, Laravel will automatically inject the model instance that has an ID matching the corresponding value from the request URI. If a matching model instance is not found in the database, a 404 HTTP response will automatically be generated.

对于您的情况:

Route::get('/users/{user}/edit', 'YourController@edit');

在你的 Controller 中:

public function edit(\App\User $user)
{
     dd($user->id);
     return view('user.update')->withUser($user);

}