UserAcademyController.php
public function view_video()
{
$materialList = DB::table('material')
->join('material_group', 'material.group_id', '=', 'material_group.id')
->select('material.*', 'material_group.group_thumbnail_url')
->get();
return view('user-academy.view_video', ['materialList' => $materialList]);
}
view_video.blade.php
@foreach ($materialList as $material)
<div class="col-sm-6 col-lg-4 col-md-4">
<div class="thumbnail">
<a href="{!! url('user-academy/view/' . $material->id)!!}">
@if($material->thumbnail_url !== null)
<img src="{{$material->thumbnail_url}}"
style="width: 700px; height: 300px">
@elseif($materialList->group_thumbnail_url !== null)
<img src="{{$materialList->group_thumbnail_url}}"
style="width: 700px; height: 300px">
@elseif($material->thumbnail_url !== null && $materialList->group_thumbnail_url !== null)
<img src="http://www.independentmediators.co.uk/wp-content/uploads/2016/02/placeholder-image.jpg"
style="width: 700px; height: 300px">
@endif
</a>
<div class="caption">
<h4 class="pull-right text-success">${{$material->price}} </h4>
<h4>
<a href="{!! url('user-academy/view/' . $material->id) !!}">{{ $material->title }}</a>
</h4>
<hr>
<p class="description">{!! $material->description !!} </p>
</div>
</div>
</div>
@endforeach
This is the "material_group" table
即使我完全复制了laravel文档中的所有内容,并遵循了许多有关该主题的视频,但还是遇到了这个错误,我是一名新程序员,所以这可能是一个非常明显的错误,但是我花了很多时间在看代码和只是找不到错误在哪里!
答案 0 :(得分:1)
您正在尝试访问group_thumbnail_url
类的Collection
属性,该属性肯定不存在,这就是您收到该错误的原因。
解决方案是将$materialList->group_thumbnail_url
替换为material->group_thumbnail_url