Question

首先，我刚开始使用laravel和整体使用php。现在我遇到了一个问题，我不知道如何从我的数据库中显示特定的视频。我的用户模型：

class User extends Model implements Authenticatable{
    use \Illuminate\Auth\Authenticatable;
    public function videos() {
        return $this->hasMany('App\Video');
    }
}

我的视频模型：

class Video extends Model{
    public function user() {
        return $this->belongsTo('App\User');
    }
}

当我浏览我的视频以在仪表板中全部显示时，一切顺利：

<div class="row" id="features">
        @foreach($videos as $video)
            <div class="col-sm-4 feature">
                <div class="panel">
                    <div class="panel-heading">
                        <h3 class="panel-title video_name">{{ $video->video_name }}</h3>
                    </div>
                    <iframe width="320" height="250"
                    src="https://www.youtube.com/embed/{{ $video->video_url  }}" allowfullscreen="allowfullscreen" mozallowfullscreen="mozallowfullscreen" msallowfullscreen="msallowfullscreen" oallowfullscreen="oallowfullscreen" webkitallowfullscreen="webkitallowfullscreen">
                    </iframe>
                    <div class="info">
                    <p>Posted by {{ $video->user->first_name }} on {{ $video->created_at }}</p>
                        <hr class="postInfo">
                    </div>

                    <p>{{ $video->description }} </p>
                    <a href="{{ route('view.video', [$video->id]) }}" class="btn btn-danger btn-block">Continue to video</a>
                </div>
            </div>
         @endforeach
    </div>

但此时：

<a href="{{ route('view.video', [$video->id]) }}" class="btn btn-danger btn-block">Continue to video</a>

我打开新路线（http://localhost:8000/video/11/view），在这种情况下我想要显示ID 11等于我的video_url的视频

视频表格代码：

public function up(){
        Schema::create('videos', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->text('video_name');
            $table->text('video_url');
            $table->text('description');
            $table->integer('user_id');
        });
}

路线：

Route::get('/video/{video_id}/view', [
    'uses' => 'SignInController@ViewVideo',
    'as' => 'view.video']);

Answer 1

将路线更改为以下..

Route::get('/video/{video}/view', [
 'uses' => 'SignInController@ViewVideo',
  'as' => 'view.video']);

在控制器..

public function ViewVideo(Video $video){
  //any authorization logic...
  return view('whatever',compact('video'));
}

Answer 2

从Laravel 5.2开始，有一个名为Implicit Route Model Binding的内容你可以阅读有关它的文档here。

所以在你的例子中。您可以像这样更改路线：

Route::get('/video/{video}/view', [
    'uses' => 'SignInController@ViewVideo',
    'as' => 'view.video'
]);

在您的Video控制器的查看方法中：

public functin view(App\Video $video) {
    // Your logic
}

Laravel如何通过它的id显示视频

2 个答案: