1、M("node_copy") -> where(array("id" => 1)) -> save(array("name" => "test"));
UPDATE `ifa_node_copy` SET `name`='test' WHERE ( `id` = 1 )

2、M("node_copy") -> where(array("id_errror" => 1)) -> save(array("name" => "test"));
UPDATE `ifa_node_copy` SET `name`='test'

正常？