agenda-libre-ruby/app/admin/dashboard.rb

ActiveAdmin.register_page 'Dashboard' do
  menu priority: 1, label: proc { I18n.t('active_admin.dashboard') }

  content title: proc { I18n.t('active_admin.dashboard') } do
    columns do
      column do
        panel 'Moderateurs' do
          ul do
            User.all.map do |user|
              li link_to("#{user.firstname} #{user.lastname} (#{user.login})",
                         user)
            end
          end
        end
      end

      column do
        panel 'Commentaires' do
          ul do
            ActiveAdmin::Comment.all.map do |comment|
              li link_to(comment.author.email, admin_comment_path(comment))
            end
          end
        end
      end
    end
    panel 'ActiveAdmin' do
      para %(Actuellement:
        #{link_to(`git rev-parse --short HEAD`,
                  "https://gitorious.org/agenda-du-libre-rails/agenda-du-libre-rails/commit/
      #{`git rev-parse HEAD`}")})
        .html_safe
    end
  end
end