Php 当父对象在一对多关系中没有子对象时，我在检查它时会得到一个非对象错误

我有一个“父”表（服务器）和一个“子”表（服务器状态）。服务器状态通过其id连接到服务器表，例如，服务器

id

与服务器状态迁移中使用一对多关系的

server\u id

相同。然后，我尝试遍历我的服务器列表，然后显示服务器的状态，该状态存储在服务器状态表中。由于某些原因，我在尝试遍历一个没有状态的服务器时遇到了问题。如果服务器的状态与之相对应，那么这就起作用了，但当我只有一个服务器而没有状态时，情况就不一样了。有谁能告诉我为什么会发生这种情况？下面是调用此视图的控制器的当前代码，以及用于遍历数据的循环

index.blade.php：

@guest  
 @if(count($servers) > 0)
   @foreach($servers as $server)
     @if($server->isPublic === 1 )
        @include('inc.statuses')
     @endif
   @endforeach
 @endif
@endguest

@auth
 @if(count($servers) > 0)
   @foreach($servers as $server)
     @include('inc.statuses') 
   @endforeach
 @endif
@endauth

@if($server->serverStatus->last()->status_id === 1)
    <a href="/servers/{{$server->id}}"  class="text-dark list-group-item list-group-item-success">{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 2)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 3)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-danger" >{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 4)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} is under maintinance</a>
@elseif($server->serverStatus->last()->status_id === null)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} has no inputted staus</a>
@else
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} has no inputted staus</a>
@endif

statuses.blade.php：

@guest  
 @if(count($servers) > 0)
   @foreach($servers as $server)
     @if($server->isPublic === 1 )
        @include('inc.statuses')
     @endif
   @endforeach
 @endif
@endguest

@auth
 @if(count($servers) > 0)
   @foreach($servers as $server)
     @include('inc.statuses') 
   @endforeach
 @endif
@endauth

@if($server->serverStatus->last()->status_id === 1)
    <a href="/servers/{{$server->id}}"  class="text-dark list-group-item list-group-item-success">{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 2)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 3)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-danger" >{{$server->name}}</a>
@elseif($server->serverStatus->last()->status_id === 4)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} is under maintinance</a>
@elseif($server->serverStatus->last()->status_id === null)
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} has no inputted staus</a>
@else
    <a href="/servers/{{$server->id}}" class="text-dark list-group-item list-group-item-warning" >{{$server->name}} has no inputted staus</a>
@endif

---

使用

$servers=Server:：has（'serverStatus'）->orderBY（'created_at'，'desc'）->get（）

仅获取状态为的服务器。

！空（$server->serverStatus）在刀片文件中也添加此条件use

$servers=server:：has（'serverStatus'）->orderBY（'created_at'，'desc'）->get（）

只获取状态为的服务器。@TheFallen工作得很好，如果你把它添加到我会尽快接受的答案中，我对laravel是相当陌生的，忘了我可以像那样链接命令。