The rounding mode sum_by_net_keep_gross is supposed to be the
consumer-friendly algorithm. However, some consumer-friendly prices are still
impossible, such as 15.00 incl. 19%. Previously, the system would round
to 15.01, because it's the gross price derived from the closest net
price. With this PR, it rounds to 14.99 instead, because consumers like
paying less more than they like paying more.
* Allow to round taxes on order-level
* Rename get_cart_total
* Persist rounding mode with order
* Add general docs
* Order creation API
* Update fee algorithm
* Rounding on payment method change
* Round when splitting order
* Fix failing tests
* Add settings page
* Add tests
* Replace algorithm
* Add test case for currency rounding
* Improve order change
* Update flowchart
* Update discount logic (more hypothetical, we don't store rounding on cart positions atm)
* Rename internal method
* Fix typo
* Update help text
* Apply suggestions from code review
Co-authored-by: luelista <weller@rami.io>
* Order rounding refactor (#5571)
* Add RoundingCorrectionMixin providing before-rounding-values as properties
* Use gross_price_before_rounding in more places
* Update doc/development/algorithms/pricing.rst
Co-authored-by: Martin Gross <gross@rami.io>
* Allow to override on perform_order
* Rebase migration
* Fix event cancellation
---------
Co-authored-by: luelista <weller@rami.io>
Co-authored-by: Martin Gross <gross@rami.io>
