Question

我有Post模型，并且有：

protected $appends = ['reviews_count'];

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

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

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

public static function updateRanks()
{
    DB::statement("UPDATE posts set `rank` = (SELECT FIND_IN_SET( CONCAT(points, '_', created_at), (SELECT GROUP_CONCAT( CONCAT(points, '_', created_at) ORDER BY points desc, created_at asc ) FROM (select * from posts) as posts_rankings)))");
}

public function getReviewsCountAttribute()
{
    return $this->reviews()->active()->count();
}

我需要在CONCAT(points, '_', created_at)中添加一个reviews_count，然后执行ORDER BY points desc, reviews_count desc, created_at asc。属性reviews_count在查询中不起作用。我需要添加子查询或联接。我该怎么做？我尝试过：

DB::statement("UPDATE posts set `rank` = (SELECT COUNT(*) FROM reviews WHERE post_id = posts_rankings.id) as reviews_count, (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 asc ) FROM (select * from posts) as posts_rankings)))");

但这会让我出错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'reviews_count

在查询Laravel中传递属性

0 个答案: