private function getConnection()
    {
        if (!isset($this->connections[$this->getDriver()])) {
            $this->connections[$this->getDriver()] = DriverManager::getConnection(
                array(
                    'driver' => $this->getDriver(),
                    'host' => str_replace('pdo_', '', $this->getDriver()),
                    'dbname' => 'list',
                    'user' => 'list',
                    'password' => 'list',
                    // 'unix_socket' => '/tmp/mysql.sock',
                )
            );
        }

        return $this->connections[$this->getDriver()];
    }