Rails 3 自动加载 [英] Rails 3 autoload

问题描述

我有一个类 ConstData:

I have a class ConstData:

class ConstData

  US_CITIES = ['miami', 'new york']

  EUROPERN_CITIES = ['madrid', 'london']

end

它存储在/lib/const_data.rb 下

Its stored under /lib/const_data.rb

这个想法是在模型、控制器或视图中我可以做到:

The idea is that inside a model, controller or view I can do:

ConstData::US_CITIES 获取 US_CITIES 等

ConstData::US_CITIES to get the US_CITIES etc

Rails 应该自动加载这个类，我从:http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/662abfd1df9b2612?hl=en

Rails should load this class automatically, I got this from: http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/662abfd1df9b2612?hl=en

然而这行不通.谁能解释我如何做到这一点?

However this does not work. Can anyone explain me how to accomplish this ?

推荐答案

@daniel 所指的帖子是 2008 年的.Rails 从那以后发生了变化.
事实上，最近.Rails3 不会自动加载 lib/目录.

The post @daniel refers to is from 2008. Rails has changed since then.
In fact, quite recently. Rails3 doesn't load the lib/ directory automatically.

不过，您可以很容易地重新激活它.打开 config/application.rb 并在配置中(在 Application 类中)添加以下内容:

You can reactivate it quite easily though. Open config/application.rb And add, in the config (in the Application class) the followin :

config.autoload_paths += %W(#{config.root}/lib)

然后你的 lib/目录将被自动加载.

Then your lib/ dir will be autoloaded.

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