php 为什么我在 Laravel 视图中得到“未定义的变量”？
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Why I get "Undefined variable" in Laravel view?
提问by milos
when I try to fetch data from table where categories are I get Undefined variable: category error.
当我尝试从类别所在的表中获取数据时，出现未定义变量：类别错误。
$posts variable work fine.
$posts 变量工作正常。
@if(count($posts))
@foreach($posts as $post)
@if($post->category)
<div class="{{ $post->category->name }} isotope-item">
<img src="../img/showcase/1.jpg" alt="">
<div class="disp-post">
<span class="icon"></span>
<p class="time">{{ $post->updated_at }}</p>
<h4>{{ Str::words($post->title, 3) }}</h4>
<p>{{ Str::words($post->body, 60) }}</p>
<p class="link">{{ HTML::linkRoute('posts.show', 'Read more', array($post->id)) }}</p>
</div>
</div>
@endif
@endforeach
@endif
but when i try $category:
但是当我尝试 $category 时：
@if(count($category))
@foreach($category as $c)
<li><a href="#" data-filter="{{ $c->name }}">Networking</a></li>
@endforeach
@endif
I get an error.
我收到一个错误。
What am I doing wrong?
我究竟做错了什么？
This is from my PostsController
这是来自我的 PostsController
public function showcase()
{
$category = Category::all();
$posts = Post::with('category')->orderBy('updated_at')->get();
return View::make('posts.showcase', compact('posts'));
}
回答by Rubens Mariuzzo
You are not passing the $categoryvariable to your view, you're just passing $posts.
您没有将$category变量传递给您的视图，您只是将$posts.
Change your line:
更改您的线路：
return View::make('posts.showcase', compact('posts'));
To be:
成为：
return View::make('posts.showcase', compact('posts', 'category'));
And your $categoryvariable will be available.
您的$category变量将可用。
