Question

在我的index.blade上，我想显示两组不同的数据，一组是计算机列表，另一组是类别列表。两种不同类型的数据。在我的控制器中我有

public function index()
{
    // Select data from table assets
    $assets = DB::table('assets')->where('status', '1')->orderBy('type', 'asc')->paginate(10);    //pass all the employees to a Var and send it to our page using "with" also puts page # at the bottom
    //select data from table  assetrefs
    $categories = DB::table('assetrefs')->get();
    //bind data and send using 'with'
    return view('assets.index')->with('assets', $assets)->with('categories', $categories);

}

在我看来，我有这两个循环

@if(count($categories) > 1)
    @foreach($categories as $row)
        {!!Form::open(['action' => ['AssetsController@showType', $row->title], 'method'=> 'POST', 'class'=> 'pull-left'])!!}
            {{Form::submit('Show '. $row->title, ['class' => 'btn btn-danger'])}}
        {!!Form::close()!!}
    @endforeach

@else
    <p> no content </p>
@endif

这显示了一堆带有类别的按钮

    <div class="well"></div>

<!-- lists all the available assets in a div all types are mixed but sorted -->
@if(count($assets) > 1)
    @foreach($assets as $asset)
        <div class="well">
            <h3>{{$asset->type}}, {{$asset->make}} - {{$asset->model}} </h3>
            <small> {{$asset->sn}}</small>
            <small> <a href="/asset/{{$asset->id}}">View this account</a></small>
        </div>
    @endforeach
    {{$assets->links()}}

@else
    <p> no content </p>
@endif

这显示了所有计算机的列表

当我加载页面时，我得到了

2/2 ErrorException
Undefined variable: categories (View: resources\views\assets\index.blade.php)

Answer 1

你可以通过使用数组而不是像下面那样传递数据来查看：

public function index()
{
  // passing data without with
  $data['assets'] = DB::table('assets')->where('status', '1')->orderBy('type', 'asc')->paginate(10); 

  $data['categories'] = DB::table('assetrefs')->get();

  return view('assets.index',$data);

  // in case if you want to use with then
  // return view('assets.index')->with($data);

}

或者即使你不想使用$ data变量想要保持$ asset和$ categories变量，那么

public function index()
{
  // passing data without with
  $assets = DB::table('assets')->where('status', '1')->orderBy('type', 'asc')->paginate(10); 

  $categories = DB::table('assetrefs')->get();

  return view('assets.index',compact('assets','categories'));

}

你可以通过url检查php中的紧凑功能是如何工作的 - ＆gt; http://php.net/manual/en/function.compact.php

Answer 2

在您的控制器中尝试此操作，代替您的view（）调用：

<Button>

查看Passing Data To Views，您会看到return view('assets.index', compact('assets', 'categories'));适合传递单个数据，而多个变量则需要将数组作为第二个参数传递。在这里，我们通过PHP compact函数传递已定义的view()->with()和assets数组。

Laravel - 从两个不同的表中选择数据以显示在blade.html上

2 个答案: