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LARAVEL：foreach 中的所有元素都有 id 1，這使得刪除它們變得不可能
P粉064448449
P粉064448449 2024-01-28 23:17:43
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我的處境很困難。 我正在用刮刀構建一個出生列表克隆，但很難對其進行編碼，因為我經驗不足。我成功建立了一個包含多個表單的管理頁面，用於插入網站、類別和連結表單，您可以在其中指定應在哪個連結上進行抓取以及將連結到哪個網站和類別。不過，要加這樣的東西沒問題，但是刪除就不行了..

我的網站、類別和連結顯示在我的管理頁面上，每個元素都有一個抓取和刪除按鈕。當我刪除行中的最後一項時，它會刪除第一個元素。當我想刪除其他內容時，laravel 會拋出一個異常，它嘗試嘗試讀取 null 上的屬性，這意味著它不再存在。當我在刪除函數之前轉儲並死亡時，每個列表中的每個項目都有 id“1”。這就是為什麼它刪除一行中的第一項。有人可以幫我嗎？

我認為這是因為請求刪除該項目的 id 是從 url 中檢索的，而 url 中給出的 id 是用戶 id，即 1。所以如果有人可以給我提示以確保我可以以不同的方式給出用戶的 ID。讓我知道！ 我的程式碼：

管理控制器：

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Website;
use App\Models\Category;
use App\Models\Link;
use Goutte\Client;


class AdminController extends Controller
{
    public function showAdmin($id)
    {

        $categories = Category::all();
        $websites = Website::all();
        $links = Link::all();
        return view('admin', compact('categories', 'websites', 'links'));
    }

    public function storeWeb(Request $request)
    {
            $web = Website::create([
                'title' => $request->input('site'),
                'url' => $request->input('url')
            ]);
        return back();
    }

    public function destroyWeb(Request $request, $id)
    {
        $web = Website::find($id);
        $web->delete();
        return back();
    }

    public function storeCat(Request $request)
    {
        $cat = Category::create([
            'title' => $request->input('title')
        ]);
        return back();
    }

    public function destroyCat(Request $request, $id)
    {
        $cat = Category::find($id)->first();
        $cat->delete();
        return back();
    }

    public function storeLink(Request $request) 
    {
        $link = Link::create([
            'url' => $request->input('scrapeUrl'),
            'main_filter_selector' => $request->input('filter'),
            'website_id' => $request->input('website_id'),
            'category_id' => $request->input('category_id'),
        ]);
        return back();
    }

    public function destroyLink(Request $request, $id)
    {
        $link = Link::find($id);
        dd($link);
        $link->delete();
        return back();
    }


    public function scrape(Request $request)
    {
        $link = Link::find($request->link_id);

        $scraper = new Scraper (new Client());

        $scraper->handle($link);

        if($scraper->status == 1) {
            return response()->json(['status' => 1, 'msg' => 'Scraping done']);
        } else {
            return response()->json(['status' => 2, 'msg' => $scraper->status]);
        };

    }
}

我的管理頁面：

<body class="relative min-h-screen">
    @include('partials.header')
   <main class="pb-20">
       <div class="text-center m-auto text-2xl p-4 w-fit border-b">
           <h2>Welkom <strong>{{ auth()->user()->name }}</strong></h2>
       </div>
       <div class="gap-10 m-auto xl:w-3/5">
            <div class="mt-8">
                <h3 class="bg-gray-100 p-4"><strong>Winkels</strong></h3>
                <div class="">
                    <div class="p-4 m-auto">
                        <form action="{{ route('newWeb', Auth()->user()) }}" method="POST">
                            @csrf
                            <div class="flex wrap flex-row items-center justify-left my-4">
                                <label for="shop" class="w-2/12">Webshop:</label>
                                <input type="text" required class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100" name="site" id="titel" placeholder="Dreambaby">
                            </div>
                            <div class="flex wrap flex-row items-center justify-left">
                                <label for="url" class="w-2/12">
                                   Voeg een url toe:
                                </label>
                                <input type="url" required class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100" name="url" id="url" placeholder="http://dreambaby.com/">
                                <button class="w-fit bg-green-400 h-fit p-2 rounded hover:bg-green-600 hover:text-white mx-2" name="shop" value="add" type="submit">Voeg link toe</button>
                            </div>
                        </form>
                            <div class="flex wrap flex-row items-center mt-12">
                                <div class="flex flex-row flex-wrap w-full">
                                    <table class="table-auto">
                                        @foreach ($websites as $web)
                                        <form action="{{ route('delWeb', Auth()->user()) }}" method="POST">
                                            @csrf
                                            @method('DELETE')
                                            <tr class="border-b">
                                                <td class="p-4">{{ $web->title }}</td>
                                                <td class="p-4">{{ $web->id }}</td>
                                                <td class="p-4"><button class="w-fit h-full p-2 bg-red-400 h-fit rounded hover:bg-red-600 hover:text-white block m-auto" type="submit">Verwijderen</button>
                                                </td>
                                            </tr>
                                        </form>
                                        @endforeach
                                    </table>
                                </div>
                            </div>
                    </div>
                </div>   
            </div>
        </div>           
        <div class="gap-10 m-auto xl:w-3/5">
            <div class="mt-8">
                <h3 class="bg-gray-100 p-4"><strong>Categorieën</strong></h3>
                <div class="mt-4">
                    <div class="p-4 m-auto">
                        <form action="{{ route('newCat', Auth()->user()) }}" method="POST">
                            @csrf
                            <div class="flex wrap flex-row items-center justify-left">
                                <label for="url" class="w-2/12">
                                   Voeg een categorie toe:
                                </label>
                                <input type="text" required class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100" name="title" id="cat" placeholder="Eten en Drinken">
                                <button class="w-fit bg-green-400 h-fit p-2 rounded hover:bg-green-600 hover:text-white mx-2" name="category_submit" type="submit">toevoegen</button>
                            </div>
                        </form>
                            <div class="flex wrap flex-row items-center mt-12">
                                <div class="flex flex-row flex-wrap w-full">
                                    <table class="table-auto">
                                        @foreach ($categories as $category)
                                        <form action="{{ route('delCat', Auth()->user()), $category->id }}" id="{{ $category->id }}" method="POST">
                                            @csrf
                                            @method('DELETE')
                                            <tr class="border-b">
                                                <td class="p-4">{{ $category->title }}</td>
                                                <td class="p-4">{{ $category->id }}</td>
                                                <td class="p-4"><button class="w-fit h-full p-2 bg-red-400 h-fit rounded hover:bg-red-600 hover:text-white block m-auto" type="submit">Verwijderen</button>
                                                </td>
                                            </tr>
                                        </form>
                                        @endforeach
                                    </table>
                                </div>
                            </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="gap-10 m-auto xl:w-3/5">
            <div class="mt-8">
                <h3 class="bg-gray-100 p-4"><strong>Scrapes</strong></h3>
                <div class="">
                    <div class="p-4 m-auto">
                        <form action="{{ route('newLink', Auth()->user()) }}" method="POST">
                            @csrf
                            <div class="flex wrap flex-row items-center justify-left my-4">
                                <label for="scrape" class="w-2/12">Url:</label>
                                <input type="text" required class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100" name="scrapeUrl" id="scrapetitel" placeholder="https://www.thebabyscorner.be/nl-be/baby_eten_en_drinken/">
                            </div>
                            <div class="flex wrap flex-row items-center justify-left my-4">
                                <label for="text" class="w-2/12">
                                   Filter:
                                </label>
                                <input type="text" required class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100" name="filter" id="url" placeholder=".1-products-item">
                            </div>
                            <div class="flex wrap flex-row items-center justify-left my-4">
                                <label for="webpicker" class="w-2/12">Winkel:</label>
                                <select name="website_id" id="" class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100">
                                    <option value="#" disabled selected>Kies je winkel</option>
                                    @foreach ($websites as $web)
                                        <option value="{{ $web->id }}" >{{ $web->title }}</option>
                                    @endforeach
                                </select>
                            </div>
                            <div class="flex wrap flex-row items-center justify-left my-4">
                                <label for="webpicker" class="w-2/12">Categorie:</label>
                                <select name="category_id" id="" class="w-7/12 h-fit p-2 focus:outline-sky-500 rounded bg-slate-100">
                                    <option value="#" disabled selected>Kies je categorie</option>
                                    @foreach ($categories as $cat)
                                        <option value="{{ $cat->id }}" >{{ $cat->title }}</option>
                                    @endforeach
                                </select>
                                <button class="w-fit bg-green-400 h-fit p-2 rounded hover:bg-green-600 hover:text-white mx-2" type="submit" name="scrape_submit">toevoegen</button>
                            </div>
                        </form>
                        <div class="flex wrap flex-row items-center mt-12 w-full">
                            <div class="flex flex-row flex-wrap w-full">
                                <form action="{{ route('delLink', Auth()->user()) }}" method="POST">
                                    @csrf
                                    @method('DELETE')
                                    <table class="table-auto w-full">
                                        <tr class="bg-slate-300">
                                            <td class="p-4"><strong>Url</strong></td>
                                            <td class="p-4"><strong>Filter selector</strong></td>
                                            <td class="p-4"><strong>Website</strong></td>
                                            <td class="p-4"><strong>Categorie</strong></td>
                                            <td></td>
                                            <td></td>

                                        </tr>
                                        @foreach ($links as $link)
                                            <tr data-id="{{ $link->id }}" class="">
                                                <td class="p-4 border-r">{{ $link->url }}</td>
                                                <td class="p-4 border-r">{{ $link->main_filter_selector }}</td>
                                                <td class="p-4 border-r">{{ $link->website->title }}</td>
                                                <td class="p-4 border-r">{{ $link->category->title }}</td>
                                                <td class="p-4 border-r"><button class="w-fit bg-green-400 h-fit p-2 rounded hover:bg-green-600 hover:text-white block m-auto" type="submit">Scrape</button></td>
                                                <td class="p-4"><button class="w-fit h-full p-2 bg-red-400 h-fit rounded hover:bg-red-600 hover:text-white block m-auto" type="submit">Verwijderen</button>
                                                </td>
                                            </tr>
                                        @endforeach
                                    </table>
                                </form>
                            </div>
                        </div>
                </div>
            </div>
        </div>
   </main>
   @include('partials.footer')
</body>

我的路線：

<?php

use Illuminate\Support\Facades\Route;

use App\Http\Controllers\HomeController;
use App\Http\Controllers\DashController;
use App\Http\Controllers\ListviewController;
use App\Http\Controllers\NewlistController;
use App\Http\Controllers\BabyController;
use App\Http\Controllers\ScrapeController;
use App\Http\Controllers\AdminController;
use App\Http\Controllers\ItemsController;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

require __DIR__.'/auth.php';

Route::get('/', [HomeController::class, 'home'])->name('home');
Route::get('/home', [HomeController::class, 'home']);

Route::get('/listview', [ListviewController::class, 'listview'])
    ->name('lists');





Route::middleware('auth')->group (function () 

{   

    Route::get('/create', [NewlistController::class, 'newlist'])
        ->name('create');

    Route::get('/dashboard/{role}/{id?}', [DashController::class, 'dashboard'])
        ->name('dashboard');

    Route::post('/dashboard/{role}/{id}', [NewlistController::class, 'store']);

    Route::get('/dashboard/{user_id}/{baby}', [BabyController::class, 'show'])
        ->name('baby');

    Route::get('/dashboard/{user_id?}/{baby}/catalogus', [ScrapeController::class, 'show']);


    Route::get('/admin/{id}', [AdminController::class, 'showAdmin'])
        ->name('admin');

    Route::post('/admin/{id}/websites/', [AdminController::class, 'storeWeb'])
        ->name('newWeb');

    Route::delete('/admin/{id}/websites/', [AdminController::class, 'destroyWeb'])
        ->name('delWeb');
 
    Route::post('/admin/{id}/categories/', [AdminController::class, 'storeCat'])
        ->name('newCat');

    Route::delete('/admin/{id}/categories/', [AdminController::class, 'destroyCat'])
        ->name('delCat');

    Route::post('/admin/{id}/links/', [AdminController::class, 'storeLink'])
        ->name('newLink');

    Route::delete('/admin/{id}/links/', [AdminController::class, 'destroyLink'])
        ->name('delLink');

});

P粉064448449
P粉064448449

全部回覆(1)
P粉403549616
P粉4035496162024-01-29 16:41:58 1樓

替換此程式碼




    @csrf
    @method('DELETE')
    
        @foreach ($links as $link)
        
        @endforeach
    

        

            Url
            Filter selector
            Website
            Categorie
            
            
            
        

            {{ $link->url }}
            {{ $link->main_filter_selector }}
            {{ $link->website->title }}
            {{ $link->category->title }}
            
            

            
        




有了這個




    @foreach ($links as $link)
    
    @endforeach


    

        Url
        Filter selector
        Website
        Categorie
        
        
        
    

        {{ $link->url }}
        {{ $link->main_filter_selector }}
        {{ $link->website->title }}
        {{ $link->category->title }}
        
        
            

                @csrf
                @method('DELETE')
                
            

        		
    


你的 destroyLink() 方法應該要包含這個


public function destroyLink(Request $request)
{  
    $id = $request->id;
    $link = Link::find($id);
    $link->delete();
    return back();
}

                            

                                 
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