versions.rb

if defined?(ActiveAdmin)
require 'active_admin/views'
require 'active_admin/views/components/panel'

module ActiveAdmin
  module PaperTrail
    module Views
      class Versions < ActiveAdmin::Views::Panel
        builder_method :active_admin_paper_trail_versions_for
        attr_accessor :resource

        def build(resource)
          @resource = resource
          super(title, for: resource)
          build_versions
        end

        protected

        def title
          I18n.t 'admin.version.title'
        end

        def build_versions
          table_for resource.versions do
            %i{id created_at event whodunnit ip}.each do|c|
              t = I18n.t("admin.version.#{c}", default: c)
              if c == :whodunnit
                column(t, c) {|v|
                  u = AdminUser.find v.whodunnit
                  link_to u.email, u
                }
              else
                column t, c
              end
            end
          end
        end
      end
    end
    module VersionsHelper
      def active_admin_paper_trail_versions(*args, &block)
        active_admin_paper_trail_versions_for(resource, *args, &block)
      end
    end
  end
end

ActiveAdmin.application.view_factory.show_page.send :include, ActiveAdmin::PaperTrail::VersionsHelper

end