Rails 3 中的显式 require
我正在将 Rails 2 应用程序转换为 Rails 3。到目前为止，我已经成功了。但是，有一个奇怪的问题，我必须明确要求任何外部文件。这是我原来的（即 Rails 2）ActiveRecord 模型：
class Book < ActiveRecord::Base
belongs_to :author
has_many :translations, :dependent => :destroy
include Freebase
...
end
为了使其在 Rails 3 中工作，我必须需要模型 Translation 和 Freebase.rb 文件，因此：
class Book < ActiveRecord::Base
require File.expand_path(File.dirname(__FILE__) + '/translation.rb')
belongs_to :author
has_many :translations, :dependent => :destroy
require File.expand_path(File.dirname(__FILE__) + '../../../lib/freebase.rb')
include Freebase
...
end
这是 Rails 3 中的正常方式，还是我做错了什么。换句话说，为什么需要显式包含这些文件？放置在 lib 文件夹中的 Freebase.rb 文件可能有某种原因，但是 Translation 模型又如何呢？在同一个目录中？
谢谢你们！
I am converting my Rails 2 app to Rails 3. So far, I've been successful. However, there is this strange issue that I have to explicitly require any external files. Here is my original (i.e. Rails 2) ActiveRecord model:
class Book < ActiveRecord::Base
belongs_to :author
has_many :translations, :dependent => :destroy
include Freebase
...
end
in order to make it working in Rails 3, I have to require the model Translation and Freebase.rb file, thus:
class Book < ActiveRecord::Base
require File.expand_path(File.dirname(__FILE__) + '/translation.rb')
belongs_to :author
has_many :translations, :dependent => :destroy
require File.expand_path(File.dirname(__FILE__) + '../../../lib/freebase.rb')
include Freebase
...
end
Is it the normal way in Rails 3, or I am doing something wrong. In other words, why is it necessary to explicitly include those files? There might probably be some reason for the Freebase.rb file, which is placed in the lib folder, but what about the Translation model which is in the same dir?
Thanks guys!
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Rails 3 不像 Rails 2 那样自动加载。
打开 config/application.rb 并自定义如下所示的行：
在您的情况下，您可能想要
Rails 3 doesn't automatically autoload quite as much as Rails 2 did.
Open up config/application.rb and customize the line that looks like:
In your case, you probably want to have