泰国是一个充满魅力的地方，很多国内外的游客把泰国曼谷称为世界艳遇之都，不仅如此，泰国还有非常丰富的旅游资源，越来越多的国人会到泰国享受一下魅力的海滩，充足的阳光，浪漫的海岛，在泰国经常听到卡昆卡，那么
I am writing开发者_高级运维 a Ruby on Rails app and I want a method to be called every time the database is modified.Is it possible to do this without inserting a method call in every location where t
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