Question

以下代码有错误。我使用的是Laravel 5.3和php 7.0。

我谷歌但仍然不清楚，任何帮助将不胜感激。

ActivationService.php

<?php

namespace App;


use Illuminate\Mail\Mailer;
use Illuminate\Mail\Message;

class ActivationService
{

    protected $mailer;

    protected $activationRepo;

    protected $resendAfter = 24;

    public function __construct(Mailer $mailer, ActivationRepository $activationRepo)
    {
        $this->mailer = $mailer;
        $this->activationRepo = $activationRepo;
    }

    public function sendActivationMail($user)
    {

        if ($user->activated || !$this->shouldSend($user)) {
            return;
        }

        $token = $this->activationRepo->createActivation($user);

        $link = route('user.activate', $token);
        $message = sprintf('Activate account <a href="%s">%s</a>', $link, $link);

        $this->mailer->raw($message, function (Message $m) use ($user) {
            $m->to($user->email)->subject('Activation mail');
        });


    }

    public function activateUser($token)
    {
        $activation = $this->activationRepo->getActivationByToken($token);

        if ($activation === null) {
            return null;
        }

        $user = User::find($activation->user_id);
        //Below is line 53.
        $user->activated = true;

        $user->save();

        $this->activationRepo->deleteActivation($token);

        return $user;

    }

    private function shouldSend($user)
    {
        $activation = $this->activationRepo->getActivation($user);
        return $activation === null || strtotime($activation->created_at) + 60 * 60 * $this->resendAfter < time();
    }

}

错误消息

ActivationService.php第53行中的ErrorException：从空值创建默认对象

上面代码的第53行是这样的：

$user->activated = true;

我怎么能解决这个问题？

Answer 1

问题很可能是因为$user = User::find($activation->user_id);返回 null 或 false 。

当你最终遇到这种情况时，总是尝试将变量转储到发生问题的地方，在这种情况下dd($activation->user_id)

我建议改用Auth::user()->id。

Laravel 5.3错误：从空值创建默认对象

1 个答案: