module ActiveAdmin::ViewHelpers::BreadcrumbHelper

def breadcrumb_links(path = request.path)
  parts = path[1..-1].split('/') # remove leading "/" and split up the URL
  parts.pop                      # remove last since it's used as the page title
  parts.each_with_index.map do |part, index|
    # 1. try using `display_name` if we can locate a DB object
    # 2. try using the model name translation
    # 3. default to calling `titlecase` on the URL fragment
    if part =~ /\A(\d+|[a-f0-9]{24})\z/ && parts[index-1]
      config = active_admin_config.belongs_to_config.try(:target) || active_admin_config
      name   = display_name config.find_resource(part)
    end
    name ||= I18n.t "activerecord.models.#{part.singularize}", :count => 1.1, :default => part.titlecase
    link_to name, '/' + parts[0..index].join('/')
  end
end