rails_admin.rb

require Rails.root.join('lib', 'rails_admin_pending_tasks.rb')

RailsAdmin.config do |config|

  # Custom Action to show pending tasks
  module RailsAdmin
    module Config
      module Actions
        class Pending < RailsAdmin::Config::Actions::Base
          RailsAdmin::Config::Actions.register(self)
        end
      end
    end
  end




  ### Popular gems integration

  ## == Devise ==
  config.authenticate_with do
    warden.authenticate! scope: :admin
  end
  config.current_user_method(&:current_admin)

  ## == Cancan ==
  # config.authorize_with :cancan

  ## == PaperTrail ==
  config.audit_with :paper_trail, 'User', '::PaperTrail::Version' # PaperTrail >= 3.0.0

  ### More at https://github.com/sferik/rails_admin/wiki/Base-configuration

  config.actions do
    dashboard                     # mandatory
    index                         # mandatory
    new
    export
    bulk_delete
    show
    edit
    delete
    show_in_app
    import

    ## With an audit adapter, you can add:
    history_index
    history_show

    # Add the nestable action for configured models
    nestable

    pending do
      # Make it visible only for article model. You can remove this if you don't need.
      visible do
        true
        # bindings[:abstract_model].model.to_s == "Task"
      end
    end
  end

end