Question

我在控制器中有一些行为，我把它们拉到一个模块中，以便更好地测试并在一些地方重用它。关于此，有两个问题：

Where is a good place to put my modules? They need to run in order to be available to the controllers, so I was thinking the config/initializers/ directory. That seems a little suspect to me though. lib/?
How do I ensure the code gets run so the modules are available to include in my controllers?

谢谢各位。

Answer 1

＜code＞lib/＜/code＞是模块的绝佳场所；至少在我看来，这比＜code＞config/iinitializers/＜/code＞要好得多。如果它是几个模块，或者是一个大模块，您也可以考虑将其作为插件，并将其放入vendor/plugins中。
如果将其放入lib/中，则需要手动需要文件。默认情况下，Rails不会自动加载lib/目录中的文件。您可以将require放在其中一个配置文件中。

我通常会将额外的自动加载放在config/application.rb中。类似这样的操作应该会奏效（假设您的.rb文件位于名为lib/my_module的目录中）：

config.autoload_paths += Dir["#{Rails.root}/lib/my_module"]

您必须确保您的模块是实际的模块，而不是类。然后，您可以简单地将其包括在内：

# lib/my_module/foobar.rb
module Foobar
  def foobar
    "Hello world!"
  end
end

# app/models/my_model.rb
class MyModel < ActiveRecord::Base
  include Foobar
end

# rails console
>> obj = MyModel.first
=> #<MyModel id: 1, ...>
>> obj.id
=> 1
>> obj.foobar
=> "Hello world!"

Answer 2

1) I like to put: my class extentions under app/extentions my modules under /app/mixins my services under /app/services

2) You can configure your application to load all of these in config/application.rb: class extentions should be required right way and the mixins and services can be added to your autoload path

  class Application < Rails::Application
    # require class extentions right now
    Dir[Rails.root.join( app ,  extentions , "*.rb")].each {|l| require l }

    # Custom directories with classes and modules you want to be autoloadable.
    config.autoload_paths += Dir[Rails.root.join( app ,  mixins ,  {**} )]
    config.autoload_paths += Dir[Rails.root.join( app ,  services ,  {**} )]

（我正在使用导轨3）

Answer 3

尝试将特定于控制器的模块放入应用程序/控制器中。无要求要求。

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