“屬性 [id] 在 Eloquent 構建器實例上不存在。”，laravel 8 Api 資源

Question

在 CONTROLLER；

public function index()
{
    $conversations = Conversation::where('user_id',auth()->user()->id)->orWhere('second_user_id',auth()->user()->id);
    
    $count = $conversations->get()->count();

    //
    for($i=0;$i<$count;$i++) {
        for ($j = $i + 1; $j < $count; $j++) {
            if ($conversations[$i]->messages->last()->id < $conversations[$j]->messages->last()->id) {
                $temp = $conversations[$i];
                $conversations[$i] = $conversations[$j];
                $conversations[$j] = $temp;
            }
        }
    }

 //  return  ConversationResource::collection($conversations);
 return  new ConversationResource($conversations);
}

應用\Http\Resources\ConversationResource；

---

public function toArray($request)
{
  return [
    'id'=> $this->id,
    'created_at'=>$this->created_at,
    'message'=>MessageResource::collection($this->messages),
  ];
}

使用 App\Http\Resources\ConversationResource；

public function toArray($request)
{
    return parent::toArray($request);``
}

Answer 1

更改此行：

$conversations = Conversation::where('user_id',auth()->user()->id)->orWhere('second_user_id',auth()->user()->id);

為此（最后添加get() ）：

$conversations = Conversation::where('user_id',auth()->user()->id)->orWhere('second_user_id',auth()->user()->id)->get();

並更改$count ：

$count = $conversations->count();