In your ActiveRecord model:
class Order < ActiveRecord::Base has_money :default_price end
Defines methods :default_price_in_dollars and :default_price_in_dollars= which make life easier when building forms.
> Order.new :default_price_in_dollars => '10.00' => #<Order default_price: 1000>
If you want to store your prices in cents but offer a form input that rounds to the nearest dollar
> order = Order.new :default_price_in_dollars_without_cents => '9.99' => #<Order default_price: 1000> > order.default_price_in_dollars_without_cents => '10'
As a gem:
$ gem install has_money
In your ‘Gemfile`:
gem 'has_money'
As a plugin:
script/plugin install git://github.com/samvincent/has_money.git