Question

需要一种解决方案，根据获胜的最大积分（赢得的金额栏中的总和）列出用户。
用户和获胜两种模式。用户有很多奖金。

 $top_scorers = User::with('winnings')->orderBy("sum of amount column in all winnings")

Answer 1

反之亦然，这会更容易：

 $usersByWinnings = Winning::with('user')
       ->select('user_id', \DB::raw('SUM(amount) as winnings'))
       ->groupBy('user_id')
       ->orderBy('winnings', 'DESC')
       ->get()->map(function (Winning $winning) {
             return $winning->user;
        });

或者，您可以进行后处理sortBy

$top_scorers = User::with('winnings')->get()
                  ->sortByDesc(function (User $user) {
                       return $user->winnings->sum('amount');
                   });

Answer 2

您可以使用修改后的withCount()：

$top_scorers = User::withCount(['winnings as amount' => function ($query) {
    $query->select(DB::raw('sum(amount)'));
}])->orderByDesc('amount')->get();

Laravel雄辩的顺序由相关模型的列总和（有许多关系）

2 个答案: