如何修改单条通知为已读？

PUT 'user/read/notifications/{id}'

DELETE 'user/read/notifications/{id}'

我自己改的，供参考，请指正
routes/api.php

...
$api->patch('user/notifications/read/{notification?}', 'NotificationsController@read')->name('api.user.notifications.read');    //标记已读

app/Http/Controllers/Api/NotificationsController.php

...
use Illuminate\Notifications\DatabaseNotification as Notification;
...
    public function read(Notification $notification)
    {
        $notification->id ? $this->user()->markAsRead($notification) : $this->user()->markAsRead();

        return $this->response->noContent();
    }
...

app/Models/User.php

...
use Illuminate\Notifications\DatabaseNotification as Notification;
...
    //标记用户通知为已读
    public function markAsRead(Notification $notification = null) {
        if ($notification) {    //标记单条已读
            --$this->notification_count;
            $notification->markAsRead();
        } else {    //标记全部已读
            $this->notification_count = 0;
            $this->unreadNotifications->markAsRead();
        }

        $this->save();
    }
...