Laravel withCount在查询中如何追加？子查询还是INNER JOIN？

Question

我在商店模型中有关系评论，并且在收藏商店中附加了计数评论：

商店型号：

class Shop extends Model
{
...

public static function boot() {
    parent::boot();

    static::saved(function() {
        static::updateRanks();
    });
}

 protected $withCount = ['reviews']

 public function reviews() {
        return $this->hasMany(Review::class);
 }
}

我尝试在查询中添加reviews_count：

public static function updateRanks()
{
    DB::statement("update shops set position = (SELECT FIND_IN_SET( CONCAT(points, '_', reviews_count, '_', created_at), (SELECT GROUP_CONCAT( CONCAT(points, '_', reviews_count, '_', created_at) ORDER BY points desc, reviews_count desc, created_at desc ) FROM (select * from shops) as shop_rankings)))");
}

但是我得到了错误：

SQLSTATE[42000]: Syntax error or access violation: 1583 Incorrect parameters in the call to native function 
'concat...

我该如何解决？我需要INNER JOIN或子查询来查询店铺的数量吗？保存商店时，我会按订购点，reviews_count和created_at来更新排名。