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長くなりがちなRailsのモデルをきれいに分割する (別解)

Posted at

ActiveSupport::Concernを使えば、若干ですが簡潔に書けます。

app/models/user.rb
class User < ActiveRecord::Base
   include User::Finder
end
app/models/user/finder.rb
module User::Finder
  extend ActiveSupport::Concern

  included do
    base.has_many :items
  end

  # クラスメソッドの定義
  module ClassMethods
    def hot
      ...
    end
  end

  # インスタンスメソッドの定義
  def search(str)
    ...
  end
end

ActiveRecord内部でもActiveSupport::Concernが頻繁につかわれていますね。

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