First of all add the ActiveAdmin and the Devise gems. Devise is needed because ActiveAdmin will use Devise as the authentication mechanism.
gem 'devise', '> 4.x' gem 'activeadmin', github: 'activeadmin'
We install the gems:
Then we modify several files in order to adapt the Rails API application:
- ActionController::API changed to ActionController::Base
- Added protection against XSRF attacks.
class ApplicationController < ActionController::Base include ActionController::Serialization protect_from_forgery :with => :exception end
We need to change config.api_only to false in order to enable several middleware needed to make Devise work. Otherwise it will always redirect to login page by default.
module YourApp class Application < Rails::Application config.api_only = false end end
Install the ActiveAdmin system in the application (this will create an AdminUser model):
rails generate active_admin:install
If you want to use an existing model as admin run:
rails generate active_admin:install User
Create the tables and seed the data:
rails db:migrate rails db:seed
This is the bare minimum that I needed to successfully have the admin page and log into the dashboard.