如何在laravel5.0 eloqeunt关系中使用max id？

Question

我使用以下功能从 schedul 表格中选择最后一个ID但是没有cocrrected

'loan'=>function($s) {
      $s->with(['schedule'=>function($schedule){
      $schedule->select(DB::raw('loan_id, schedule_date, principal as schedule_principal','max(id) as id'));
   }]);
}]);

Answer 1

将select更改为：

DB::raw('loan_id, schedule_date, principal as schedule_principal, max(id) as id')