未定义变量：主题（查看：B:\laravel2\forum\resources\views\home.blade.php）[关闭]

Question

我已经尽力了，但我还是不明白，我尝试将 $subject 从视图调用到控制器，但我的网络总是显示此错误消息

这是我的控制器

<?php

namespace App\Http\Controllers\Forum;

use App\Http\Controllers\Controller;
use App\subjects;
use Illuminate\Http\Request;

class ThreadController extends Controller
{
    public function __construct()
    {
        $this->middleware('Auth');
    }

    public function create()
    {
        $subjects = Subjects::all();
        return view("threads.create", ['subjects' -> $subjects]);
    }
}

这是我的刀片模板

    <div class="form-group">
        <label for="subject">Subject</label>
        <select  name="subject" id="subject" class="form-control">
            <option name="subject" id="subject" class="form-control">
            </option>
            @foreach ($subjects as $subject)
                <option value="{{ $subject->id }}">{{ $subject->name }}</option>
            @endforeach
        </select>
    </div>

这是错误信息

错误异常

未定义变量：主题（查看：B:\laravel2\forum\resources\views\home.blade.php）

Answer 1

    return view("threads.create", ['subjects' -> $subjects]);

必须转换为

    return view("threads.create", ['subjects' => $subjects]);

或者你可以使用php函数compact。

return view("threads.create",compact('subjects');