<%-
  # Based on Active Admin
  generator = RUBY_VERSION =~ /^1.8/ ? FasterCSV : CSV

  output = generator.generate do |csv|
    cols = @interface.attributes_for(:index)
    csv << cols.map(&:title)
    @collection.each do |object|
      csv << cols.map do |col|
        if col.data
          col.data.call(object, col)
        else
          pretty_format(object.send(col.attribute))
        end
      end
    end
  end
%>
<%= output.html_safe %>