Convert a currency given an exchange rate

[adrianmarino]

For example:

# Knowing that 1 USD is equivalent to 15 ARS...
usd = Money.new(100, :USD)
ars = Money.exchange from: usd, to: :ARS, rate: 15
assert ars == Money.new(1500, :ARS)

or

Money.rate(:USD, :ARS, 15)
usd = Money.new(100, :USD)
ars = Money.convert usd, to: :ARS
assert ars == Money.new(1500, :ARS)

[maennchen]

Have a look at this library: (I built exactly for that use case)
https://github.com/jshmrtn/currency-conversion

[Nitrino]

This feature includes a list for implementation in the near future.

[theguuholi]

I am going to try to implement this feature.

[lessless]

This will be nice to have indeed. My 5c for using rate and keeping it stateless:

usd = Money.new(100, :USD)
ars = Money.convert(usd, to: :ARS, rate: 15)
assert ars == Money.new(1500, :ARS)