This gem extends Money::Bank::VariableExchange with Money::Bank::GoogleCurrency and gives you access to the current Google Currency exchange rates.
require 'money'
require 'money/bank/google_currency'
# (optional)
# set the seconds after than the current rates are automatically expired
# by default, they never expire
Money::Bank::GoogleCurrency.ttl_in_seconds = 86400
# set default bank to instance of GoogleCurrency
Money.default_bank = Money::Bank::GoogleCurrency.new
# create a new money object, and use the standard #exchange_to method
money = Money.new(1_00, "USD") # amount is in cents
money.exchange_to(:EUR)
# or install the 'monetize' gem
money = 1.to_money(:USD)
money.exchange_to(:EUR)
An UnknownRate will be thrown if #exchange_to is called with a Currency
that Money knows, but Google does not.
An UnknownCurrency will be thrown if #exchange_to is called with a
Currency that Money does not know.
A GoogleCurrencyFetchError will be thrown if there is an unknown issue with the Google Finance Converter API.
Copyright (c) 2011 Shane Emmons. See {file:LICENSE} for details.