class Money::Bank::SingleCurrency
Class to ensure client code is operating in a single currency by raising if an exchange attempts to happen.
This is useful when an application uses multiple currencies but it usually deals with only one currency at a time so any arithmetic where exchanges happen are erroneous. Using this as the default bank means that that these mistakes don't silently do the wrong thing.
Public Instance Methods
exchange_with(from, to_currency, &block)
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Raises a DifferentCurrencyError
to remove possibility of accidentally exchanging currencies
# File lib/money/bank/single_currency.rb, line 19 def exchange_with(from, to_currency, &block) raise DifferentCurrencyError, "No exchanging of currencies allowed: #{from} #{from.currency} to #{to_currency}" end