/**
* 获取实例的方法
* @return $this
*/
public static function get_instance()
{
if (is_null(self::$_instance)) {
$class = __CLASS__;
self::$_instance = new $class();
}
return self::$_instance;
}
/**
* @param int $flow_id
* @return array
*/
private static function _get_fields_by_flow_id($flow_id)
{
$flow = new Module_FlowManager_Flow();
$flow->id = $flow_id;
$flow_info = $flow->get();
if (!$flow_info) {
return Lib_Helper::get_err_struct(Const_Err_DataAccess::ERR_FLOW_NOT_EXISTS, 'no this flow, flow_id: ' . $flow_id);
}
$fields = Module_ModuleManager_InterfaceGen::get_instance()->gen_fields($flow);
return Lib_Helper::get_return_struct($fields);
}
