CakePHP counterCache包含

Question

我有以下数据库结构：

用户

id, username, ..., silver_medal_counter, gold_medal_counter, bronze_medal_counter

徽章

id, name, description, points, medal (silver, gold, bronze)

Userbadges

id, user_id, badge_id, created

如果添加了userbadge，则counterCache应更新users表中的相关medal_counter字段。

我有什么：

class Userbadge extends AppModel {
     public $belongsTo = array(
          'User' => array(
            'counterCache' => array(
                'silver_medal_counter' => array('Userbadge.Badge.medal' => 'silver'),
                'gold_medal_counter' => array('Userbadge.Badge.medal' => 'gold'),
                'bronze_medal_counter' => array('Userbadge.Badge.medal' => 'bronze')
            )
          ),
          'Badge' => array('className' => 'Badge')
      );
}

注意：包含$actAs = array('Containable');。我正在使用cakephp 2.5.6。

我该如何解决这个问题？