Question

切换到router / catalog / {id}时出现错误。试图得出相应类别的标题，但显然做错了，请告诉我错误在哪里。

             // Routers
             Route::get('/', 'SiteController@index');
             Route::get('/catalog', 'SiteController@catalog');
             Route::get('/catalog/{id}', 'SiteController@catalog_page');
             Route::get('/contacts', 'SiteController@contacts');

             //Controllers
             class SiteController extends Controller
             {

               public function catalog()
            {
              return view('catalog', ['menus' => Menu::all(),'products' => Tovar::all()]);
             }
             public function catalog_page($id)
{
             $category = new Menu();
             $category = $category->with('children')->where('id', $id)->get()->toArray();

    return view('catalog_page', ['menus' => Menu::all(),'products' => Tovar::all(),'result' => $category]);
}

         public function contacts()
          {
          return view('contacts', ['menus' => Menu::all(),'products' =>              Tovar::all(),]);
          }
           public function index()
           {
            return view('index',['menus' => Menu::all(),'products' => Tovar::all(),]);
      }
      }

       // Model Menu
     <?php

     namespace App;

     use Illuminate\Database\Eloquent\Model;

     class Menu extends Model
    {
     protected $table = 'menus';
    }

    // views
    @extends('template')

    @section('content')

    <div class="content__right">

    <h1>{{$result['title']}}</h1>
    </div>

    @endsection

Undefined index: title (View: D:\OSPanel\domains\blog\resources\views\catalog_page.blade.php) - error

Answer 1

检查category是string还是array。如果是字符串，您可以

// views
    @extends('template')

    @section('content')

    <div class="content__right">

    <h1>{{$result}}</h1>
    </div>

    @endsection

如果数组比

检查$category是否具有 title 键。只需打印并验证即可。

您能否转储$category数据并显示它。

Answer 2

该错误表示$category没有索引title。

您可以像这样使用dd()来检查变量$category。

$category = $category->with('children')->where('id', $id)->get()->toArray();
dd($category);

您可以这样：

// views
    @extends('template')

    @section('content')

    <div class="content__right">
    @if($result)
    <h1>{{$result['title']}}</h1>
    @else
    <h1>no title</h1>
    </div>
    @endif
    @endsection

显示所选Laravel类别的标题

2 个答案: