ascetic_ddd.seedwork.domain.values.money.bank¶

Classes

class ascetic_ddd.seedwork.domain.values.money.bank.Bank[source]¶

Bases: object

Handles currency conversion using exchange rates.

The Bank maintains a table of exchange rates and provides the reduce operation to convert expressions to a target currency.

add_rate(from_currency, to_currency, rate)[source]¶

Add an exchange rate.

Parameters:¶

from_currency¶

The source currency code

to_currency¶

The target currency code

rate¶

The exchange rate (how many from units equal one to unit)

Return type:¶

None

rate(from_currency, to_currency)[source]¶

Get the exchange rate between two currencies.

Parameters:¶

from_currency¶

The source currency code

to_currency¶

The target currency code

Return type:¶

int

Returns:¶

The exchange rate. Returns 1 if converting to the same currency.

reduce(source, to)[source]¶

Reduce an expression to a Money object in the target currency.

Parameters:¶

source¶

The expression to reduce

to¶

The target currency code

Return type:¶

Money

Returns:¶

Money object in the target currency