I prefer to use a controller, because I can use it to fire the model logic, then do some validation processing, and then route the user to an error-handling or result page as appropriate.
我更喜欢使用控制器，因为我可以使用它来触发模型逻辑，然后进行某种验证处理，接着将用户路由到一个相应的错误处理或结果页。
The rails generate scaffold page line in Listing 6 automatically created the route in line 2, which is RESTful.
在清单6中，rails generate scaffold page这一行命令可自动在第二行创建路径，这是rest式的。
Two routes are required: a default route to find the home page and another route to find a page by its slug.
需要两条路径：一条默认的路径用来查找主页面，而另外一条路径则通过标头来查找页面。
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