我试过 ->limit(4)方法，但这似乎不起作用

@foreach(auth()->user()->unreadNotifications()->limit(4) as $notification) 
    <li> 
        <a href="profile.html"> 
           <div> 
              {{ $notification->data['message'] }}<span class="pull-right text-muted small">{{ time_elapsed_string($notification->created_at) }}</span> 
           </div> 
        </a> 
    </li> 
@endforeach 

请您参考如下方法:

您不要在此处执行查询:

@foreach(auth()->user()->unreadNotifications()->take(4)->get() as $notification)