module ControllerMixins::CsvInstanceMethods
  require 'csv'

  def to_csv(objects, skip_attributes=[], delimiter= ",")
    return "" if objects.blank?
    objects_class = objects.first.class
    filtered_columns = objects_class.column_names - skip_attributes
    CSV.generate do |csv|
      csv << filtered_columns
      objects.each do |object|
        csv << filtered_columns.collect { |a| object.attributes[a].blank? ? '' : "'#{object.attributes[a]}'" }
      end
    end
  end
end