php - 创建从数据库中删除数据的函数的困难

Question

我在表格中创建了一个按钮来实现网站删除数据的功能，我按照视频教程做了所有的事情，在我做完所有事情刷新页面后出现错误：

未定义变量：值（查看：/home/vagrant/code/bacon/resources/views/business.blade.php）

（我还附上了错误截图）https://i.stack.imgur.com/4nLEX.png

我的控制器“BusinessController.php”：

<?php

namespace App\Http\Controllers;
    
use \App\Models\Business;
use Illuminate\Http\Request;

class BusinessController extends Controller
{
    public function index()
    {
        $business = \App\Models\Business::all();
        return view('business', compact('business'));
    }

    public function createbusiness()
    {
        return view('/createbusiness');
    }

    public function create()
    {
        return view('business.create');
    }

    function delete($idd)
    {
        DB::table('business')->where('idd',$idd)->delete();
        return redirect ('/business');
    }

    public  function store()
    {
        $business = new Business();
        $business->idd = request('idd');
        $business->name = request('name');
        $business->mail = request('mail');
        $business->website = request('website');
        $business->save();
        return redirect('/business');
    }
}

我的路线“web.php”：

<?php

    use App\Http\Controllers\UserController;
    use Illuminate\Support\Facades\Route;

    /*
    |--------------------------------------------------------------------------
    | 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!
    |
    */

    Route::get('/welcome', 'App\Http\Controllers\MainController@welcome');
    Route::get('/users', 'App\Http\Controllers\MainController@users');
    Route::get('/business', 'App\Http\Controllers\BusinessController@index');
    Route::post('/business', 'App\Http\Controllers\BusinessController@store');
    Route::get('/projects', 'App\Http\Controllers\ProjectsController@index');
    Route::post('/projects', 'App\Http\Controllers\ProjectsController@store');
    Route::get('/projects/create', 'App\Http\Controllers\ProjectsController@create');
    Route::get('/business/create', 'App\Http\Controllers\BusinessController@createbusiness');
    Auth::routes();
    Route::get('/delete/{idd}','App\Http\Controllers\BusinessController@delete');
    Route::get('/home', [App\Http\Controllers\HomeController::class, 'index'])->name('home');

我的观点“business.blade.php”：

@extends('layouts.layout')
@section('title')Бізнес@endsection
@section ('main_content')
    <h1>Бизнес</h1>
    <p>
    <table class="table table-dark">
            <thead>
              <tr>
                <th scope="col">ID</th>
                <th scope="col">Name</th>
                <th scope="col">Mail</th>
                <th scope="col">Website</th>
                <th scope="col">Edit</th>
                <th scope="col">Delete</th>
              </tr>
            </thead>
            <tbody>
                @foreach ($business as $singleBusiness)
                <tr>
                    <th scope="row">{{ $singleBusiness->idd}}</th>
                    <td>{{ $singleBusiness->name}}</td>
                    <td>{{ $singleBusiness->mail}}</td>
                    <td>{{ $singleBusiness->website}}</td>
                        <td><a href="/delete/{{ $value->idd }}">
       <button class="btn btn-danger btn-delete">Delete</button></a></td>
              </tr>
              @endforeach
            </tbody>
        </table>
        <a class="col-4 btn btn-outline-warning mr-3" href="/business/create">Додати Бізнес</a>
        </p>
@endsection

Answer 1

只需更改<td><a href="/delete/{{ $value->idd }}">为<td><a href="/delete/{{ $singleBusiness->idd }}">

Answer 2

将路由方法 Get 方法更改为 Post 方法！

`Route::post('/delete/{idd}','App\Http\Controllers\BusinessController@delete')->name('Delete');

<Form action="{{ route( 'Delete', $singleBusiness->id) }}" method="POST" >
    @csrf  
    <button type="submit" class="btn btn-danger btn-delete">Delete</button>
</form>