Thinkphp 5.0 获取最后执行的SQL

  
         $q=new Question();
            $q->save(['qcount'=>$qs->qcount+1],['id'=>input('qid')]);
           ///////=========================================
        var_dump((new Question())->db()->getLastSql());   //=
            ///=================================================
            //die;
            $stu = new Student();
            $res = $stu->save([
                'qid' => input('qid'),
                'tid' => input('tid'),
                'lock' => 1
            ], [
                'uname' => Session::get('uname')
            ]);
        用的就是

(new Question())->db()->getLastSql()；

 

执行操作的是哪个数据表， 就用哪个数据模型