public function save($datas, array $identifier = array(), $shardingKey = null, &$affectedRows = null)
    {
        $this->getConnection()->delete($this->getCacheKey($identifier));
    }
public function save($datas, array $identifier = array(), $shardingKey = null, &$affectedRows = null)
    {
        $this->getConnection()->delete($this->getCacheKey($identifier));
    }
@param array $datas
@param array $identifier
@param null  $shardingKey
@param null  $affectedRows

@throws \Exception