Ruby Rails的設計哲學

Rails把java的方式戲稱為XML仰臥起坐（sit-ups）。

Rails是一個完整的，開源的web開發架構，更多的快樂和更少的代碼。

貫穿整個架構的是DRY(不要重複)原則，具體體現比如：定義好資料庫表後，類名字和對象屬性名稱字都自動確定了。用過hibernate的朋友知道我在說什麼(你也許會說xdoclet, 那不也得學嗎)。

學習成本低，不需要學習各種XML花式（學習過struts,spring,hiber,webwork,ant,maven的朋友知道我在說什麼），只需要學習Ruby語言就夠了。

編程的快樂又回來了，沒有編譯和部署，即改即得，所有的複雜都隱藏在架構內部了。

你感受到它的哲學了嗎？自己安裝試試看吧。

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作為對照，以下文字來自rails網站首頁：

Rails is a full-stack, open-source web framework in Ruby for writing real-world applications with joy and less code than most frameworks spend doing XML sit-ups

Being a full-stack framework means that all layers are built to work seamlessly together. That way you Don’t Repeat Yourself (DRY) and you can use a single language from top to bottom. Everything from templates to control flow to business logic is written in Ruby—the language of love for industry heavy-weights.

In striving for DRY compliance, Rails shuns configuration files and annotations in favor of reflection and run-time extensions.

This means the end of XML files telling a story that has already been told in code. It means no compilation phase: Make a change, see it work. Meta-data is an implementation detail left for the framework to handle.