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["sraps \(KN dati\)" <452854@xxxxxxxxxxxxxxxxxx>]

** Changed in: openobject-addons
       Status: Fix Released => New

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https://bugs.launchpad.net/bugs/452854

Title:
  Cannot validate invoices with foreign currency

Status in OpenObject Addons Modules:
  New

Bug description:
  Hello,
have stumbled upon interesting problem. Latvian Lats (LVL) is the base currency for Accounting. Try to issue (or encode received from supplier) invoice in Euros(EUR). The same would happen between any other currencies too.

Invoice totals:
Total w/o VAT (Untaxed): 1158,00 EUR
Tax VAT 21% : 243,18 EUR
Total: 1401,18 EUR

Try to Confirm invoice and you will get "You can not validate a non balanced entry !"

Made some investigation what is wrong, and have found that the problem is.

Obviously the totals are calculated perfectly right, but as the base currency for accounting is different from the currency we are issuing invoice the accounting moves are done in the base currency, in this case LVL.

So goes the currency exchange

Total w/o VAT (Untaxed): 1158,00 EUR ->(813,8470320 ~813,85 LVL)
Tax VAT 21% : 243,18 EUR ->(170,9078767 ~170,91 LVL)
Total: 1401,18 EUR ->(984,7549087 ~984,75 LVL)

Which again are technically right, with one difference, that the totals for posting are now not dependent on each other anymore. They are being rounded before posting.

If you would issue invoice in a base currency the difference is in 0.01LVL, which is lost during rounding process. Notice the Total sum.
Example:
Total w/o VAT (Untaxed): 813,85 LVL
Tax VAT 21% : 170,91 LVL (VO_VAT * 21% = 170,9085000)
Total: 984,76 LVL (VO_VAT + VAT_21)

To deal around floating point storage in Python (as well as other programming languages), allowed difference between sums are allowed 0.0001. This is the place where postings do not pass validate(...) function in "account.py".

This is right as balance between credit and debit should be equal. What should be done - accountant would probably create write-off entry for the missing sum to make the balance right. This functionality is missing in OpenERP, and is fundamental for foreign trade.

Any ideas?

P.S. version 5.0.6.

Kaspars