尝试在 laravel 5.5 中获取非对象的属性

我试图显示我的变量值以查看页面，但它显示尝试获取非对象属性的错误。请有人帮助我。 这是我的控制器-

public function myAffiliates(Request $request) {
    if ($user_id = Sentinel::getUser()->id) {
        $affiliates = DB::table('affiliate_users')
          ->where('affiliate_users.user_id', $user_id)
          ->first();
    }
    //dd($affiliates);
    return view('dashboard.affiliates.show',['affiliates' => $affiliates]);
}

我这样写到我的查看页面 -

@foreach ($affiliates as $affiliate)
    <ul>
        <li>First Upline - {{ $affiliate->first_upline_id }} Pts,</li>
        <li>Second Upline - {{ $affiliate->second_upline_id }} Pts,</li>
        <li>Third Upline - {{ $affiliate->third_upline_id }} Pts.</li>
    </ul>
@endforeach

use first()检索单个对象

use get()检索集合并在刀片上迭代它