异常 FatalThrowableError Class 'app\models\category' 未找到

Exception FatalThrowableError Class 'app\models\category' not found

我不明白我哪里弄错了。以下是报错。

Symfony\Component\Debug\Exception\FatalThrowableError Class 'app\models\category' not found

class homepage extends Controller
{
    public function index()
    {
        print_r(category::all());
        die();

        return view('frontend.homepage', $categories);
    }
}

线路错误。 print_r(category::all());die();

将此行 use app\models\category; 更改为 use App\Models\Category;

public function index(){

    print_r(Category::all());die();
    $categories = Category::all();
    return view('frontend.homepage',compact('categories'));

}