laravel groupBy 分页

$model=DB::table('tablebname')
        ->where(function($query) use ($res){
           	$query->where('xx','xx');
        })
        ->selectRaw("area,from_unixtime(created_time,'%Y-%m-%d') as dates,sum(num) as use_num,path,desc")
        ->groupBy(['dates','area','path','money_id'])
        ->orderBy('dates','desc');

$data=DB::table(DB::raw("({$model->toSql()}) as temptable"))
        ->mergeBindings($model)
        ->paginate(15);