From 967c06a3a63439ce705a2ff49461a3e16c3e8d8e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Wed, 18 Apr 2018 10:19:10 +0200
Subject: [PATCH] Quantize to number of digits instead of rounding computed
 amount

Rounding may change the result if currency rounding is not unitary.

issue7284
review41251002
---
 account.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/account.py b/account.py
index fcfb50cfc9..0fa575f4fe 100644
--- a/account.py
+++ b/account.py
@@ -227,7 +227,8 @@ class Account(DeactivableMixin, ModelSQL, ModelView):
                 balance += account_sum[child.id]
             if account.display_balance == 'credit-debit' and balance:
                 balance *= -1
-            balances[account.id] = account.currency.round(balance)
+            exp = Decimal(str(10.0 ** -account.currency_digits))
+            balances[account.id] = balance.quantize(exp)
         return balances
 
     @classmethod
@@ -275,8 +276,9 @@ class Account(DeactivableMixin, ModelSQL, ModelView):
                 result[name][account_id] += value
         for account in accounts:
             for name in names:
-                result[name][account.id] = account.currency.round(
-                    result[name][account.id])
+                exp = Decimal(str(10.0 ** -account.currency_digits))
+                result[name][account.id] = (
+                    result[name][account.id].quantize(exp))
         return result
 
     def get_rec_name(self, name):