Add ability to nest Money.with_rounding_mode blocks
#1128
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so that it can emphasize it's behaviour better
So that it won't return to the global value in case if someone will modify down in the stack. For example we might have: ```ruby - initializers/money.rb Money.rounding_mode = BigDecimal::ROUND_HALF_EVEN - controllers/test.rb Money.with_rounding_mode(BigDecimal::ROUND_UP) do object.amount = Money.from_amount(1.234) object.save other_object.amount = object.amount * different_rate end - models/object.rb def save Money.with_rounding_mode(BigDecimal::ROUND_DOWN) do self.tax = object.amount * tax_rate end ... end ``` Above example prior the change would cause other_object to use `ROUND_HALF_EVEN`, despite it's explicitly defined in a `with_rounding_mode` block which sets `ROUND_UP`. The small rounding errors might be tricky to debug, and in worst case scenarios can cumulate to a bigger differences when code operates on multiple amounts that might be incorrectly rounded. Co-Authored-By: Łukasz Wójcik <[email protected]>
lukasz-wojcik
approved these changes
May 9, 2025
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WHAT
Allow .with_rounding_mode blocks nesting
WHY
So, that we can safely use the block and not rely on global
rounding_mode.Relates to the comment in PR which introduced the feature #343 (comment)