Rails5へのActiveAdminの導入

基本的にActiveAdminのreadme読めばいいだけの話ですが作業メモがてら

1.Gemfileを編集

依存関係にあるのでdevise未導入の場合は一緒に導入

Gemfile

# framework for creating administration style interfaces
gem 'activeadmin', github: 'activeadmin'
gem 'inherited_resources', github: 'activeadmin/inherited_resources'
gem 'devise' # if you need

2. bundle install

3. インストーラを実行

bundle exec rails g active_admin:install 

いつもの設定事項リストなので割愛

  ===============================================================================

Some setup you must do manually if you haven't yet:

  1. Ensure you have defined default url options in your environments files. Here
     is an example of default_url_options appropriate for a development environment
     in config/environments/development.rb:

       config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

     In production, :host should be set to the actual host of your application.

  2. Ensure you have defined root_url to *something* in your config/routes.rb.
     For example:

       root to: "home#index"

  3. Ensure you have flash messages in app/views/layouts/application.html.erb.
     For example:

       <p class="notice"><%= notice %></p>
       <p class="alert"><%= alert %></p>

  4. You can copy Devise views (for customization) to your app by running:

       rails g devise:views

===============================================================================

4. DB migration

AdminUserモデルのmigrationファイルが生成され、seed.rbに初期ユーザのseedが追記されているので反映
この際、初期管理者ユーザのmail, P/W は以下を編集しておけば変更できる

db/seed.rb

AdminUser.create!(email: '[e-mail]', password: 'password', password_confirmation: 'password')

migrationを実行

bundle exec rails db:migrate
bundle exec rails db:seed

5. 動作確認

bundle exec rails s

http://localhost:3000/admin へアクセスして、初期管理者ユーザのmail, P/Wでログインできれば成功