Installing Active Admin in a Rails application is as easy as adding the gem to your Gemfile:
# Gemfile
gem 'activeadmin'
If you are using Rails >= 3.1, you must also include a beta version of MetaSearch and sass-rails:
# Gemfile in Rails >= 3.1
gem 'activeadmin'
gem 'sass-rails'
Once you have added the gem to your Gemfile (and any other dependencies), you need to run the Active Admin install generator.
$> rails generate active_admin:install
This will install Active Admin the default settings. By default it will create a new Devise user / model called AdminUser. To change the name of the user class, simply pass the class as the last argument:
$> rails generate active_admin:install User
Instead of generating an AdminUser class, this command will create a User class.
You can skip the Devise user class all together by using the skip-users flag:
$> rails generate active_admin:install --skip-users
NOTE: If you don't use the default user settings, you will need to configure the
settings in config/intializers/active_admin.rb to suite your needs.
After running the installer, run rake db:migrate to ensure that all db tables
are created.
To upgrade Active Admin, simply update the version number in your Gemfile, then run the assets generator:
$> rails generate active_admin:assets
This command makes sure you have all the latest assets and your installation is up to date. Each time you upgrade Active Admin, you should run this command.
If you use will_paginate in your app, you need to configure an initializer for
Kaminari to avoid conflicts. Put this in config/initializers/kaminari.rb
Kaminari.configure do |config|
config.page_method_name = :per_page_kaminari
end