Rails 2 - Absolute of money

Question

How to get absolute value of money? e.g:

-2.to_money.? = 2.to_money
 2.to_money.? = 2.to_money

I have an attribute total_price, which may be positive or negative. I want to calculate the absolute value of total_price.

Answer 1

There's now an absolute value method built-in to the Money::Arithmetic module:

2.to_money.abs == #<Money fractional:200 currency:USD> # true
-2.to_money.abs == #<Money fractional:200 currency:USD> # true

Answer 2

Try taking the absolute value before converting to money.

2.abs.to_money