php - 拉维尔 : How to count in query

Question

我有以下查询:

App\User::join('gift_sents', function($builder){
      $builder->on('gift_sents.receiver_id', '=', 'users.id');
      })
      ->select('users.*', 'COUNT(gift_sents.receiver_id as total_posts')
      ->groupBy('gift_sents.id')
      ->orderBy('total_posts', 'ASC')
      ->limit(3)->get();

计数不起作用，它应该起作用!

出现以下错误:

未找到列:1054 未知 “字段列表”中的“COUNT(gift_sents.receiver_id”列(SQL:选择用户。*，COUNT(gift_sents 。receiver_idastotal_postsfromusersinner joingift_sentsongift_sents.receiver_id=用户.idgroup bygift_sents.idorder bytotal_postsasc limit 3)

Answer 1

我认为应该是:

  ->select('users.*', DB::raw('COUNT(gift_sents.receiver_id) as total_posts'))

参见文档 here - “原始表达式”部分