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Laravel 模型 中间件 示例
海阔天空
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Laravel 模型 中间件 示例

Laravel 模型示例

  • 利用 artisan 命令行创建Article模型
    php artisan make:model Article
  1. <?php
  3. namespace App;
  5. use Illuminate\Database\Eloquent\Model;
  7. class Article extends Model
  8. {
  9.     //重新定向数据库表文件
  10.     protected  $table='article';
  11. }

Laravel 模型方法

  1. <?php
  3. namespace App\Http\Controllers;
  4. use Illuminate\Support\Facades\DB;
  5. use Illuminate\Http\Request;
  6. use App\Article;
  8. class Home extends Controller
  9. {
  10.     //model 模型
  11.     public  function mymodels(Article $article){
  12.         echo '<br> mymodel.blade执行了...';
  13.         //将返回的模型类转为数组 
  14.         $res=$article->get()->toArray();
  15.         //  echo '<pre>';
  16.         //  print_r($res);
  17.         return view ('mymodel',['items'=>$res]);
  18.     }
  19. }

Laravel blade模板文件

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <link rel="stylesheet" href="/layui/css/layui.css" />
  7.     <title>模型、中间件示例</title>
  8. </head>
  9. <body>
  10.     <table class="layui-table">
  11.         <thead>
  12.                 <tr>
  13.                     <td>ID</td>
  14.                     <td>CATE_ID</td>
  15.                     <td>标题</td>
  16.                 </tr>
  17.             </thead>
  18.             <tbody>
  20.                 @foreach ($items as $val)
  21.                    <tr>
  22.                        <td>{{$val['id']}}</td>
  23.                        <td>{{$val['cate_id']}}</td>
  24.                        <td>{{$val['title']}}</td>
  25.                    </tr>
  26.                 @endforeach
  27.             </tbody>
  30.     </table>
  31. </body>
  32. </html>

Laravel 中间件创建

命令行 php artisan make:middleware Mymiddle

  1. <?php
  3. namespace App\Http\Middleware;
  5. use Closure;
  7. class Mymiddle
  8. {
  9.     /**
  10.      * Handle an incoming request.
  11.      *
  12.      * @param  \Illuminate\Http\Request  $request
  13.      * @param  \Closure  $next
  14.      * @return mixed
  15.      */
  16.     public function handle($request, Closure $next)
  17.     {
  18.         echo "这是一个中间件...";
  19.         return $next($request);
  20.     }
  21. }

注册中间件

  1. protected $routeMiddleware = [
  2.         'auth' => \App\Http\Middleware\Authenticate::class,
  3.         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
  4.         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
  5.         'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
  6.         'can' => \Illuminate\Auth\Middleware\Authorize::class,
  7.         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
  8.         'password.confirm' => \Illuminate\Auth\Middleware\RequirePassword::class,
  9.         'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
  10.         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
  11.         'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
  12.         'mymiddle' => \App\Http\Middleware\Mymiddle::class,
  13.     ];

触发中间件

  1. Route::get('/dbmodels','home@mymodels')->middleware('mymiddle');

效果图

总结：
1、Laravel 模型中需重映射数据库表文件。
2、中间件需 创建-注册-触发。
3、命令行 创建模型、中间件等，需要把当前目录定为artisan所在目录。

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：中间件之前要前置方法或请求拦截器, 不是新东西
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