src/MVC/Module.php
private function getModuleConfigFile()
    {
        if (!$this->db_config_file) {
            $db_config_file = $this->getConfig()->get('sys', 'db_config');
            if (!$db_config_file) {
                $db_config_file = 'db.config.php';
            }

            $this->setDatabaseConfigFile($db_config_file);
        }

        return $this->db_config_file;
    }
private function getModuleConfigFile()
    {
        if (!$this->db_config_file) {
            $db_config_file = $this->getConfig()->get('sys', 'db_config');
            if (!$db_config_file) {
                $db_config_file = 'db.config.php';
            }

            $this->setDatabaseConfigFile($db_config_file);
        }

        return $this->db_config_file;
    }
获取连接配置文件名

@return mixed