This plugin allows you to accept commas from users for integer fields in an ActiveRecord model.

Example

  # Table name: cities
  # population   :integer(11)

  class City < ActiveRecord::Base
    allow_commas :population
  end

Now the user can type population "1,000,000" into a form and it will still save correctly as "1000000" instead of "1". This saves you the hassle of stripping out commas either in JavaScript or in the controller.