Money Open Exchange Rates

A gem that calculates the exchange rate using published rates from open-exchange-rates

Usage

require 'money/bank/open_exchange_rates_bank'
moe = Money::Bank::OpenExchangeRatesBank.new
moe.cache = 'path/to/file/cache'
moe.app_id = 'your app id from https://openexchangerates.org/signup'
moe.update_rates

# (optional)
# set the seconds after than the current rates are automatically expired
# by default, they never expire
moe.ttl_in_seconds = 86400
# Store in cache
moe.save_rates

Money.default_bank = moe

You can also provide a Proc as a cache to provide your own caching mechanism perhaps with Redis or just a thread safe Hash (global). For example:

moe.cache = Proc.new do |v|
  key = 'money:exchange_rates'
  if v
    Thread.current[key] = v
  else
    Thread.current[key]
  end
end

Tests

As of the end of August 2012 all requests to the Open Exchange Rates API must have a valid app_id. You can place your own key on a file or environment variable named TEST_APP_ID and then run:

bundle exec rake

Refs

• https://github.com/currencybot/open-exchange-rates
• https://github.com/RubyMoney/money
• https://github.com/RubyMoney/eu_central_bank
• https://github.com/RubyMoney/google_currency

Contributors

Wayne See (8) Kevin Ball (3) Paul Robinson (2) Michael Morris (2) Dmitry Dedov (2) chatgris (2) Sam Lown (1) Fabio Cantoni (1)

License

The MIT License

Copyright © 2014 Laurent Arnoud [email protected]

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