Money Historical Bank
A gem that add a
Money::Bank able to handle historical rates, and infer rates from limited rates.
- You can add rates for any currency pair, at a special date. Use
home_rungem if you need fast date handling in ruby.
- If no rates exist for a given date, the gem will try to download historical rates from open-exchange-rates
- The gem is able to guess inverse rates (EURUSD rate when only USDEUR is present), and go through USD when using other pairs. For example, GBPEUR will be calculated using USDGBP and USDEUR. This strategy isn't used if said rate (GBPEUR) is already set.
- No caching exists, but you can use
export_datathe same way
require 'money/bank/historical_bank' mh = Money::Bank::HistoricalBank.new # Exchanges 1000 EUR to USD using Date.today (default if no date has been entered). # Will download today's rates if none have been entered mh.exchange_with(1000.to_money('EUR'), 'USD') # Exchanges 1000 EUR to USD using historical rates date = Date.new(2009,9,9) mh.set_rate(date, 'USD', 'EUR', 0.7634) mh.exchange_with(date, 1000.to_money('USD'), 'EUR') # => 763.4 EUR Money.default_bank = mh
Created using mainly the base
VariableExchange implementation, OpenExchangeRates implementation and idea based on
Feel free to create a new loader (cf
OpenExchangeRatesLoader) if you know a source for more historical data.
Feel free to suggest refactoring.
The MIT License
Copyright © 2011 Damien Couture firstname.lastname@example.org