Conversions

The conversions plugin does a number of things. The core functionality is the unit conversion:

1.miles.to(:kilometres) #=> 1.609344
1.pounds.to(:kilograms) #=> 0.453592

It also adds a class method to ActiveRecord::Base that allows you to define conversion methods for attributes:

class Car < ActiveRecord::Base
  conversion_accessor :weight, :internal => :kilograms, :external => :pounds
end

car = Car.new(:weight => 1500)
car.weight_in_pounds #=> 3306.93393

Installation

As a gem

Configure the gem in environment.rb:

config.gem 'Fingertips-conversions', :lib => 'conversions', :source => 'http://gems.github.com'

Install them using Rails’ rake task:

$ rake gems:install

In your vendor directory:

script/install plugin git://github.com/Fingertips/conversions.git