未定义的变量:播放列表(查看:C:xampphtdocslaravel53resourcesview

我尝试制作一个crud，但我发现了这个错误：

未定义的变量：播放列表(查看：C：\xampp\htdocs\laravel53\resources\views\pages\playlist\index.blade.php(

创建正在工作...但索引号...

我正在使用拉拉维尔 5.4

这是我的控制器：

<?php
namespace AppHttpControllers;
use AppHttpControllersController;
use IlluminateHttpRequest;
use AppHttpRequests;
use Auth,
    Response,
    Storage,
    Session,
    Redirect,
    Validator,
    Image,
    Input;
use AppPlaylist;
class PlaylistsController extends Controller {
    public function index() {
          $playlists = Playlist::all();
          return View('pages.playlist.index')->withPlaylists($playlists);
    }
    public function create() {
        return view('pages.playlist.create');
    }
    public function store(IlluminateHttpRequest $request) {
        $this->validate($request, [
        'title' => 'required',
        'description' => 'required',
        'authors' => 'required',
        'date' => 'required',
        'url' => 'required',
        'menssage' => 'required',
        ]);
        $input = $request->all();
        Playlist::create($input);

        Session::flash('flash_message', 'Video/img successfully added!');
         return view('admin');
    }
    public function show($id) {
        $playlists = Playlist::findOrFail($id);
        return view('pages.playlist.show')->withPlaylits($playlists);
    }
    public function edit($id) {
        $playlists = Playlist::findOrFail($id);
        return view('pages.playlist.edit')->withPlaylits($playlists);
    }
    public function update(Request $request, $id) {
        $playlists = Playlist::findOrFail($id);
        $this->validate($request, [
        'title' => 'required',
        'description' => 'required',
        'authors' => 'required',
        'date' => 'required',
        'url' => 'required',
        'menssage' => 'required',
        ]);
        $input = $request->all();
    $playlists ->fill($input)->save();
    Session::flash('flash_message', 'Task successfully added!');
    return redirect()->back();
}

    public function destroy($id) {

      $playlists = Playlist::findOrFail($id);
    $playlists ->delete();
    Session::flash('flash_message', 'Task successfully deleted!');
    return redirect()->route('playlist.index');
}
}

我的索引：

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        @section('content')
<h1>Task List</h1>
<p class="lead">Here's a list of all your tasks. <a href="{{ route('playlist.create') }}">Add a new one?</a></p>
<hr>
   @foreach($playlists as $playlist) 
    <h3>{{ $playlist->title }}</h3>
    <p>{{ $playlist->description}}</p>
    <p>{{ $playlist->authors}}</p>
    <p>{{ $playlist->date}}</p>
    <p>{{ $playlist->url}}</p>
    <p>{{ $playlist->menssage}}</p>
    @endforeach 
    <p>
        <a href="{{ route('playlist.show', $playlist->id) }}" class="btn btn-info">View Task</a>
        <a href="{{ route('playlist.edit', $playlist->id) }}" class="btn btn-primary">Edit Task</a>
    </p>
    <hr>

@stop
        @extends('layouts.master')
@section('content')

    </body>
    </html>

控制器

public function index() {
      $playlists = Playlist::all();
      return View('pages.playlist.index')->with(['data', $playlists]);
}

在索引边栏选项卡中，只需了解，删除与边栏选项卡相关的代码。

<?php 
print_r($data);
?>

或
你可以简单地做

public function index() {
      $playlists = Playlist::all();
      return view('pages.playlist.index',['data'=>$playlists]);
}

在索引边栏选项卡中，只需执行print_r($data)并查看结果，然后相应地循环访问它。从索引边栏选项卡中删除所有内容，因为您要在此处扩展主边栏选项卡。因此，删除所有内容(HTMLs(，只需在索引刀片中编写一行代码，即print_r($data(。

你应该在你的视图中写这个

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        @section('content')
<h1>Task List</h1>
<p class="lead">Here's a list of all your tasks. <a href="{{ route('playlist.create') }}">Add a new one?</a></p>
<hr>
   @foreach($playlists as $playlist) 
    <h3>{{ $playlist->title }}</h3>
    <p>{{ $playlist->description}}</p>
    <p>{{ $playlist->authors}}</p>
    <p>{{ $playlist->date}}</p>
    <p>{{ $playlist->url}}</p>
    <p>{{ $playlist->menssage}}</p>
    <p>
        <a href="{{ route('playlist.show', $playlist->id) }}" class="btn btn-info">View Task</a>
        <a href="{{ route('playlist.edit', $playlist->id) }}" class="btn btn-primary">Edit Task</a>
    </p>
@endforeach 
    <hr>
@stop
        @extends('layouts.master')
@section('content')
    </body>
    </html>

在你的控制器方法中，你写这个

public function index() {
          $playlists = Playlist::all();
          return View('pages.playlist.index', comapct('playlists'));
    }

这将解决您的问题

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