Laravel — P46：控制器销毁（CMP）

我们到了最后一个方法：​destroy​​。您猜对了，该​​destroy​​方法将从数据库中删除资源。这是最简单的一堆。我们只需要创建一个链接，删除一个资源并将用户返回到页面​​index​​。

路由

路线已经创建。我们在几篇文章之前就这样做了。

Route::prefix('/personalcars')->group(function() {
    Route::delete('/{id}', [PersonalCarController::class, 'destroy']);
});

​​delete​​我们只需要向我们的路线发送请求​​personalcars/{id}​​。

创建删除请求

在我们销毁资源之前，我们需要能够到达那里。你如何​​delete​​向 Laravel 发送请求？用表格。

<form method="post" action="..."> 
    @csrf
    @method('delete')
    <button type="submit">Delete</button>
</form>

我们只需要将我们的按钮添加到我们认为资源应该存在的位置。我会把它添加到我们的​​index.blade.php​​文件旁边​​Edit Car​​。

<x-layouts.app title="{{ $title }}">
    <div class="flex bg-white mt-12">
        <div class="items-center text-center lg:text-left px-8 md:px-12 lg:w-full">
            <div class="relative overflow-x-auto">
                @if (session('status'))
                    <div class="block bg-green-200 p-4">
                        {{ session('status') }}
                    </div>
                @endif
                <table class="w-full text-sm text-left text-gray-500 dark:text-gray-400">
                    <thead class="text-xs text-gray-700 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400">
                        <tr>
                            <!-- ... -->
                            <th scope="col" class="px-6 py-3">
                                Delete
                            </th>
                        </tr>
                    </thead>
                    <tbody>
                        @foreach($cars as $car)
                            <tr class="bg-white border-b dark:bg-gray-800 dark:border-gray-700">
                                <!-- ... -->
                                <td class="px-6 py-4">
                                    <form method="post" action="/personalcars/{{ $car->id }}">
                                        @csrf
                                        @method('delete')
                                        <button type="submit">Delete</button>
                                    </form>
                                </td>
                            </tr>
                        @endforeach
                    </tbody>
                </table>
            </div>
        </div>
    </div>
    <a href="/personalcars/create">
        <button class="block bg-green-400 hover:bg-green-600 text-white uppercase text-lg mx-auto p-4 rounded" type="submit">Add New Car</button>
    </a>
</x-layouts.app>

销毁方法

该路由会将代码定向​​destroy​​到​​PersonalCarController​​. 在其中，我们只需要删除资源并将用户重定向回​​index.blade.php​​成功消息即可。

<?php

namespace App\Http\Controllers;

use App\Models\Image;
use App\Models\PersonalCar;
use App\Models\PersonalCarBrand;
use App\Models\PersonalCarModel;
use Faker\Provider\Person;
use Illuminate\Http\Request;

class PersonalCarController extends Controller
{
    // ...

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     */
    public function destroy($id)
    {
        PersonalCar::destroy($id);

        return redirect()->to('/personalcars/')->with('status', 'Your car has been deleted.');
    }
}

我经历并删除了一堆汽车。现在只有一个问题。我们关于那辆车的图像仍然位于关联的表格中。我们将在下一篇文章中进行图像清理。

mysql> select * from image_personal_car;
+-----------------+----------+
| personal_car_id | image_id |
+-----------------+----------+
|               1 |        1 |
|               1 |        3 |
|              18 |        6 |
|              15 |        7 |
|              15 |        8 |
|              18 |        9 |
+-----------------+----------+
6 rows in set (0.00 sec)

mysql> select * from images;
+----+---------------------------------------------------------------+-------------------------+---------------------+---------------------+
| id | url                                                           | alt                     | created_at          | updated_at          |
+----+---------------------------------------------------------------+-------------------------+---------------------+---------------------+
|  1 | https://pngimg.com/uploads/chevrolet/%D1%81hevrolet_PNG18.png | 2007 Chevy Corvette     | 2023-01-22 13:15:11 | 2023-01-22 13:15:11 |
|  2 | https://pngimg.com/uploads/chevrolet/%D1%81hevrolet_PNG23.png | 2003 Chevy Corvette     | 2023-01-22 13:29:50 | 2023-01-22 13:29:50 |
|  3 | https://pngimg.com/uploads/chevrolet/%D1%81hevrolet_PNG25.png | 2003 Chevy Corvette     | 2023-01-22 13:30:08 | 2023-01-22 13:30:08 |
|  4 | https://pngimg.com/uploads/chevrolet/%D1%81hevrolet_PNG60.png | Test Image              | 2023-01-22 13:36:52 | 2023-01-22 13:36:52 |
|  5 | images/CHl8y3afKXuwgE8DZWt0D61vOwUEkB11CtSIl0lO.jpg           | 2003 Chevy Corvette     | 2023-01-28 17:46:41 | 2023-01-28 17:46:41 |
|  6 | images/yrqW77FwXqfwmdLA3rH2FQFoavAXxuolz48s5LKu.jpg           | 2003 Chevy Corvette     | 2023-01-28 17:47:02 | 2023-01-28 17:47:02 |
|  7 | images/ZFfJMUIIu0B8JXjqux51poDcCUTm6hC3msIM9C8n.jpg           | 2024 Chevy Corvette Z06 | 2023-01-29 22:07:37 | 2023-01-29 22:07:37 |
|  8 | images/b44fQE1vLjfmEJfJvbIeoMmKNKUjiztUPSByEHJk.jpg           | 2024 Chevy Corvette Z06 | 2023-01-29 22:07:43 | 2023-01-29 22:07:43 |
|  9 | images/BoCbU6B71w1e1WuKpLGdIOv6nsVUaiI1NtiQcmJ6.jpg           | 2003 Chevy Corvette     | 2023-01-29 22:14:08 | 2023-01-29 22:14:08 |
+----+---------------------------------------------------------------+-------------------------+---------------------+---------------------+
9 rows in set (0.00 sec)