A fairly trivial plugin allowing easy serialisation of Money values (from the money gem) as attributes on activerecord objects
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gem install acts_as_money -v 0.2.2
Money ===== acts_as_money is a fairly trivial plugin that makes it easier to work with the money gem. It's available in Rubygems - just 'gem install acts_as_money'. class Product < ActiveRecord::Base acts_as_money money :price end This assumes that there are 2 columns in the database, cents (integer) and currency (string). These fields can be changed by setting the :cents and :currency options. To use the default currency, you can simple set :currency to false class Room < ActiveRecord::Base acts_as_money money :rate, :cents => :rate_in_cents, :currency => :rate_currency money :discount, :cents => :discount_in_cents, :currency => false end By default, your money field will default to a value of 0. If you require it to default to nil, you may set the :allow_nil option: class Meal < ActiveRecord::Base acts_as_money money :bill, :allow_nil => true end m = Meal.new m.bill #returns nil r = Room.new r.rate #returns <Money:0x24fd53a6 @currency="USD", @cents=0> acts_as_money allows you to pass a String, Fixnum, Float or Money object as a parameter to the setter, and it will call #to_money to convert it to a Money object. This makes it convenient for using money fields in forms. r = Room.new :rate => "100.00" r.rate # returns <Money:0x249ef9c @currency="USD", @cents=10000>