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rails-style-guide\n\nrailsのスタイルガイド\n\n## skinny Controller, fat Model\n\n### controller の action を分割する\n\nUsersController があるとします。さらに、管理画面において、ユーザの名前を更新するフォームと、メールアドレスを更新するためのフォームを別のURLで提供する必要があるとします。簡単に書くとこのようになるでしょうか。\n\n```ruby\nclass Admin::UsersController \u003c ApplicationController\n  before_action :authenticate\n\n  def index\n    @users = User.per(10).page(params[:page])\n  end\n\n  def show\n    @user = User.find(params[:id])    \n  end\n\n  def edit_name\n    @user = User.find(params[:id])    \n  end\n\n  def update_name\n    @user = User.find(params[:id])    \n    unless @user.update(name: params[:user][:name])\n      render :edit_name\n    end\n  end\n\n  def edit_email\n    @user = User.find(params[:id])\n  end\n\n  def update_email\n    @user = User.find(params[:id])\n    unless @user.update(name: params[:user][:email])\n      render :edit_email\n    end    \n  end    \nend\n```\n\nしかし上記のように、基本の7つ(index, show, new, create, edit, update, destroy)以外のアクションを定義するのは良くない傾向です。これはまだ十分小さいコードですが、この調子でなんでも一つのコントローラに詰め込もうとするとコントローラのコードが肥大化し、内容を理解するのが大変になります。\n\nそれではどのようにすると良いでしょうか。コントローラを適切に分割します。\n\n```ruby\nclass Admin::UsersController \u003c ApplicationController\n  before_action :authenticate\n\n  def index\n    @users = User.per(10).page(params[:page])\n  end\n\n  def show\n    @user = User.find(params[:id])        \n  end\nend\n\nclass Admin::Users::NamesController \u003c ApplicationController\n  before_action :authenticate\n\n  def edit\n    @user = User.find(params[:id])\n  end\n\n  def update\n    @user = User.find(params[:id])    \n    unless @user.update(name: params[:user][:name])\n      render :edit\n    end\n  end\nend\n\nclass Admin::Users::EmailsController \u003c ApplicationController\n  before_action :authenticate\n\n  def edit\n    @user = User.find(params[:id])        \n  end\n\n  def update\n    @user = User.find(params[:id])            \n    unless @user.update(name: params[:user][:email])\n      render :edit\n    end\n  end\nend\n```\n\nリソースごとに分割することで、基本の7つのアクションの範囲内で書くことができました。\n\n\n## skinny ActiveRecord Model\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwillnet%2Frails-style-guide","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwillnet%2Frails-style-guide","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwillnet%2Frails-style-guide/lists"}