class ActiveAdmin::CSVBuilder

def build(controller, csv)
  @collection  = controller.send :find_collection, except: :pagination
  columns      = exec_columns controller.view_context
  options      = ActiveAdmin.application.csv_options.merge self.options
  bom          = options.delete :byte_order_mark
  column_names = options.delete(:column_names) { true }
  csv_options  = options.except :encoding_options, :humanize_name
  csv << bom if bom
  if column_names
    csv << CSV.generate_line(columns.map{ |c| encode c.name, options }, csv_options)
  end
  ActiveRecord::Base.uncached do
    (1..paginated_collection.total_pages).each do |page|
      paginated_collection(page).each do |resource|
        resource = controller.send :apply_decorator, resource
        csv << CSV.generate_line(build_row(resource, columns, options), csv_options)
      end
    end
  end
  csv
end