ActiveAdmin hacks to support Mongoid
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Latest commit ad546e3 Sep 21, 2017 @boie0025 boie0025 Merge pull request #109 from activeadmin/nb/activeadmin-1.1
Some cleanup of association checking, spec setup, increasing coverage



ActiveAdmin is holding off on pulling Mongoid support into the core ActiveAdmin application. This repo was pulled into the ActiveAdmin org from previous work done by Elia Schito, and will be maintained by Nic Boie, JD Guzman, Elia Schito and other ActiveAdmin and community members.

Requirements for version 0.4.0

  • Ruby 2.2.2 or greater. (Note, ruby-2.4.0 fails specs, see this issue)
  • Requires Rails 5.0.x
  • Mongoid 6.0.x
  • ActiveAdmin 1.x

Previous versions

  • Rails 4.x with Mongoid 5.x use branch rails4-mongoid5
  • Rails 4.x with Mongoid 4.x branch rails4
  • Mongoid 3.x with older versions of rails use v 0.3.0

Rails 4 with


This gem has been brought into the ActiveAdmin org for support and maintenance.


ActiveAdmin hacks to support Mongoid. Some ActiveAdmin features are disabled or not working properly:

  • comments are disabled by default
  • filters are somewhat broken

For more on Mongoid support in ActiveAdmin see this issue.


Some Gems

Add the following gems to your application's Gemfile, and lock the version:

gem 'activeadmin-mongoid', '0.4.0'

You can safely remove the following lines, since are already activeadmin-mongoid dependencies:

gem 'activeadmin'
gem 'meta_search', '>= 1.1.0.pre'
gem 'sass-rails',  ['~> 3.1', '>= 3.1.4']

Remove Application Dependencies

In your config/application.rb, replace :

require 'rails/all'

with :

require "action_controller/railtie"
require "action_mailer/railtie"
require "active_resource/railtie"
require "sprockets/railtie"
require "rails/test_unit/railtie"

rails/all includes elements requiring ActiveRecord::Connection ...

Bundle & Crank


$ bundle
$ rails g devise:install
$ rails g active_admin:install

Check that the generated initializers/devise.rb file requires mongoid orm. You may find a line like this :

require 'devise/orm/mongoid'

Then create the admin user:

$ rails console
>> AdminUser.create :email => '', :password => 'password', :password_confirmation => 'password'

And that's pretty much it !


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request


Copyright © 2012 Elia Schito. See LICENSE for details.