我想在关联时返回得是多对多关联关系得分组数据，不知道能否实现！在尝试对多对多分组时，执行得查询sql都会自带关联键，我想知道有没有方法隐藏或者是不查询关联字段？

模型关联代码

public function orderEstatePoints()
    {
        return $this->belongsToMany(EstatePoint::class, 'order_estate_points')
            ->select([
                'estate_points.position_id',
                DB::raw('sum(use_number) as use_number_sum')
            ])->groupBy(['estate_points.position_id']);
    }

下面是我打印得sql

SELECT
    `m_estate_points`.`position_id`,
    sum( use_number ) AS use_number_sum,
    `m_order_estate_points`.`estate_id` AS `pivot_estate_id`,
    `m_order_estate_points`.`estate_point_id` AS `pivot_estate_point_id` 
FROM
    `m_estate_points`
    INNER JOIN `m_order_estate_points` ON `m_estate_points`.`id` = `m_order_estate_points`.`estate_point_id` 
WHERE
    `m_order_estate_points`.`estate_id` IN ( 1 ) 
    AND `m_estate_points`.`deleted_at` IS NULL 
GROUP BY
    `m_estate_points`.`position_id`

最后是我报错信息

    "message": "SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #4 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'media.m_order_estate_points.estate_point_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by (SQL: select `m_estate_points`.`position_id`, sum(use_number) as use_number_sum, `m_order_estate_points`.`estate_id` as `pivot_estate_id`, `m_order_estate_points`.`estate_point_id` as `pivot_estate_point_id` from `m_estate_points` inner join `m_order_estate_points` on `m_estate_points`.`id` = `m_order_estate_points`.`estate_point_id` where `m_order_estate_points`.`estate_id` in (1) and `m_estate_points`.`deleted_at` is null group by `m_estate_points`.`position_id`)",