Laravel DB::raw

Question

   Trip::select('trips.id','trips.date_trip',
        DB::raw('(select count(region_id) as count from trip_regions where trip_id=trips.id) as count')
    )->where('count',10)->get();

错误

"SQLSTATE[42S22]: Column not found: 1054 Unknown column 'count' in 
'where clause' (SQL: select `trips`.`id`, `trips`.`date_trip`, (select 
count(region_id) as sum from trip_regions where trip_id=trips.id) as 
count from `trips` where `count` = 10)

我有查询行想要 DB::raw。你能帮助我吗？？？非常感谢

Answer 1

用having 子句试试这个

Trip::select('trips.id','trips.date_trip',
    DB::raw('(select count(region_id) as count from trip_regions where trip_id=trips.id) as count')
)->having('count', '=',10)->get();

您不能对自定义别名应用where 子句，where 仅适用于您的表中存在的列。要过滤掉表达式/聚合结果集的结果，您需要having 子句