代码如下：

public function examPaper(){
  return $this->hasOne(ExamPaper::class, "ep_id", "es_epid")->field("ep_id,ep_name");
}

public function user(){
  return $this->hasOne(User::class, "us_id", "es_uid")->field("us_id,us_name,us_number,us_unit,us_department");
}

public function examRecord(){
  return $this->hasMany(ExamRecord::class, "er_esid", "es_id");
}

public static function getExamStatisticsPage(array $map=[], int $sort){
  $webInfo = website(); //平台设置
  $sort == 1 ? $order = "score Desc, es_id Desc" : $order = "score Asc, es_id Desc"; //排序

  return ExamStatistics::field("es_id,es_epid,es_uid,es_examNum,es_electExamNum")
 ->withSum(["examRecord"=>"score"], "er_score")
 ->withJoin([
  "examPaper"=>["ep_id", "ep_name"],
  "user"=>["us_id","us_name","us_number","us_unit","us_department"],
  ])
 ->where($map)->order($order)->paginate(['list_rows'=>PageNum,'query'=>Request::param()])->each(function ($item) use ($webInfo){
  $item["examNum"] = $item["es_examNum"] + $item["es_electExamNum"]; //已考次数
  $item["notExamNum"] = $webInfo["examNum"] - $item["examNum"]; //未考次数
  return $item;
  });
}

报错信息：

SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘tb_exam_statistics.es_id’ in ‘where clause’

去掉withJoin或者withSum其中一个就可以正常显示数据，有没有大神解答一下小弟的疑惑