Active Admin is a Ruby Gem.
gem 'activeadmin' # Plus integrations with: gem 'devise' gem 'cancancan' gem 'draper' gem 'pundit'
More accurately, it's a Rails Engine that can be injected into your existing Ruby on Rails application.
Setting up Active Admin
After installing the gem, you need to run the generator. Here are your options:
- If you don't want to use Devise, run it with
rails g active_admin:install --skip-users
- If you want to customize the name of the generated user class, or if you want to use an existing user class, provide the class name as an argument:
rails g active_admin:install User
- Otherwise, with no arguments we will create an
AdminUserclass to use with Devise:
rails g active_admin:install
The generator adds these core files, among others:
Now, migrate and seed your database before starting the server:
rails db:migrate rails db:seed rails server
http://localhost:3000/admin and log in as the default user:
- User: [email protected]
- Password: password
Voila! You're on your brand new Active Admin dashboard.
To register an existing model with Active Admin:
rails generate active_admin:resource MyModel
This creates a file at
app/admin/my_model.rb to set up the UI; refresh your
browser to see it.
When upgrading to a new version, it's a good idea to check the CHANGELOG.
To update the JS & CSS assets:
rails generate active_admin:assets
You should also sync these files with their counterparts in the AA source code:
If you use
will_paginate in your app, you need to configure an initializer for
Kaminari to avoid conflicts.
# config/initializers/kaminari.rb Kaminari.configure do |config| config.page_method_name = :per_page_kaminari end
If you are also using Draper, you may
want to make sure
per_page_kaminari is delegated correctly:
Draper::CollectionDecorator.send :delegate, :per_page_kaminari
If you're getting the error
wrong number of arguments (6 for 4..5), read #2703.
For new apps starting with Rails 6.0, Webpacker has become the default asset generator. You can opt-in to using Webpacker for ActiveAdmin assets as well by updating your configuration to turn on the
use_webpacker option, either at installation time or manually.
- at active_admin installation:
rails g active_admin:install --use_webpacker
. do |config| config.use_webpacker = true end
And run the generator to get default Active Admin assets:
rails g active_admin:webpacker