WIP

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountingTransaction_convertDestinationPrice.py

 """Convert the amounts used in the accounting transaction to the currency of the destination section
 """
 portal = context.getPortalObject()
-precision = context.getDestinationSectionValue().getPriceCurrencyValue().getQuantityPrecision()
+currency = context.getDestinationSectionValue().getPriceCurrencyValue()
+precision = currency.getQuantityPrecision()
+base_unit_quantity = currency.getBaseUnitQuantity()
 line_list = context.contentValues(
       portal_type=portal.getPortalAccountingMovementTypeList())
 
+total_destination_total_asset_price = 0.0
 for line in line_list:
   section = line.getDestinationSectionValue()
   if section != context.getDestinationSectionValue():
@@ -24,8 +27,19 @@ for line in line_list:
 
   # update the corresponding price and round it according to the precision of
   # the converted currency
-  line.setDestinationTotalAssetPrice(
-       round(exchange_rate * (line.getQuantity()), precision))
+  destination_total_asset_price = round(exchange_rate * (line.getQuantity()), precision)
+  total_destination_total_asset_price += destination_total_asset_price
+  line.setDestinationTotalAssetPrice(destination_total_asset_price)
+
+# Adjust last line so that we keep debit == credit
+if total_destination_total_asset_price:
+  # make sure difference is not too big.
+  # TODO: check this is correct maybe we can have more than 1 time base_unit_quantity ?
+  assert -base_unit_quantity <= total_destination_total_asset_price <= base_unit_quantity
+  line_to_adjust = line_list[-1]
+  line_to_adjust.setDestinationTotalAssetPrice(
+      line_to_adjust.getDestinationTotalAssetPrice() - total_destination_total_asset_price)
+
 
 msg = context.Base_translateString('Price converted.')
 

[Jérome Perrin]

@xiaowu.zhang

pour mémoire, des valeurs qui reproduisent

19925.50 * 15.55 = 309841.525 apres rounding c'est 309841.53
1174.74 * 15.55 = 18267.207 roudning 18267.21
mais  21 100.24 * 15.55 = 328108.732 rounding 328108.73

[Jérome Perrin]

des valeurs plus simples:

taux = 0.333

q_list = [2, 2, -3, -1]
converted_list = []

for q in q_list:
    converted = round(q*taux, 2)
    print (q, converted)
    converted_list.append(converted)

print (sum(converted_list))