嵌套资源：缺少必需参数 (laravel)

Question

我对 Laravel 很陌生，老实说 - 这是一个很棒的框架。然而，我对一些嵌套资源有点困惑——包括对它们进行增删改查。

对于我正在使用的路线

Route::resource('startups','StartupsController');
Route::resource('startups.usecases','UsecasesController');

php artisan route:list

|        | GET|HEAD  | admin/startups                                   | admin.startups.index            | App\Http\Controllers\StartupsController@index                               | web,admin,auth:admin |
|        | POST      | admin/startups                                   | admin.startups.store            | App\Http\Controllers\StartupsController@store                               | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/create                            | admin.startups.create           | App\Http\Controllers\StartupsController@create                              | web,admin,auth:admin |
|        | DELETE    | admin/startups/{startup}                         | admin.startups.destroy          | App\Http\Controllers\StartupsController@destroy                             | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}                         | admin.startups.show             | App\Http\Controllers\StartupsController@show                                | web,admin,auth:admin |
|        | PUT|PATCH | admin/startups/{startup}                         | admin.startups.update           | App\Http\Controllers\StartupsController@update                              | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}/edit                    | admin.startups.edit             | App\Http\Controllers\StartupsController@edit                                | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}/usecases                | admin.startups.usecases.index   | App\Http\Controllers\UsecasesController@index                               | web,admin,auth:admin |
|        | POST      | admin/startups/{startup}/usecases                | admin.startups.usecases.store   | App\Http\Controllers\UsecasesController@store                               | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}/usecases/create         | admin.startups.usecases.create  | App\Http\Controllers\UsecasesController@create                              | web,admin,auth:admin |
|        | DELETE    | admin/startups/{startup}/usecases/{usecase}      | admin.startups.usecases.destroy | App\Http\Controllers\UsecasesController@destroy                             | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}/usecases/{usecase}      | admin.startups.usecases.show    | App\Http\Controllers\UsecasesController@show                                | web,admin,auth:admin |
|        | PUT|PATCH | admin/startups/{startup}/usecases/{usecase}      | admin.startups.usecases.update  | App\Http\Controllers\UsecasesController@update                              | web,admin,auth:admin |
|        | GET|HEAD  | admin/startups/{startup}/usecases/{usecase}/edit | admin.startups.usecases.edit    | App\Http\Controllers\UsecasesController@edit                                | web,admin,auth:admin |

对于 parent，这里称为 "startups"，一切都很好，我可以 CRUD 一切都很好。

对于child，这里调用"usecases"，index、create、store都可以。当我尝试将 link 添加到我的模板中的编辑、删除或显示时，我开始收到： [Route: admin.startups.usecases.destroy] [URI: admin/startups/{ 缺少必需的参数startup}/usecases/{usecase}].

A link 在我的索引 blade 文件中：

<li><a href="{{ route('admin.startups.usecases.show',$startup->id, $usecase->id) }}">Show</a></li>

returns那个错误。

在我的 UsecasesController 中

public function show($startup_id, $usecase_id)
    {
        $startups = $startup_id;
        $usecase = Usecase::find($usecase_id);
        return view('admin.startups.usecases.show')
        ->with('usecase', $usecase)
        ->with('startups', $startups);
    }

TLDR：我可以访问和增删改查 parent、"startups" 上的所有内容。我可以为 child 创建和存储，但不能为 "usecases".

编辑、显示或删除

感谢您的帮助。

Answer 1

您需要以数组形式传递参数：

route('admin.startups.usecases.show', [$startup->id, $usecase->id])

而 show() 方法将如下所示：

public function show($startup, $usecase)
{
    ....

嵌套资源：缺少必需参数 (laravel)

Nested Resource : Missing required parameters (laravel)

php

laravel

laravel-5

laravel-5.4