fix asset price on accounting line

See merge request nexedi/erp5!1611

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountingTransaction_roundDebitCredit.py

@@ -9,21 +9,9 @@ What is expected with this script:
   - In reality we probably also want that amount on vat line match invoice vat
   amount, but we have ignored this.
 """
-
-precision = context.getQuantityPrecisionFromResource(context.getResource())
-resource = context.getResourceValue()
-
-line = None
-total_quantity = 0.0
-
 line_list = context.getMovementList(
             portal_type=context.getPortalAccountingMovementTypeList())
 
-for line in line_list:
-  line_quantity = round(line.getQuantity(), precision)
-  line.setQuantity(line_quantity)
-  total_quantity += line_quantity
-
 # If no "line" found (eg no SIT line), then do nothing. This is in the case where a SIT
 # has only Invoice Line and no SIT Line. Otherwise account_type_dict will be empty =>
 # asset_line = None => the assert below will fail because getTotalPrice() will returns the
@@ -31,28 +19,26 @@ for line in line_list:
 if not line_list:
   return
 
-abs_total_quantity = abs(round(total_quantity, precision))
-# The total quantity should be zero with a little error, if simulation has been
-# completely applied, because the debit and the credit must be balanced. However,
-# this is not the case, if the delivery is divergent, as the builder does not
-# adopt prevision automatically, when a conflict happens between the simulation
-# and user-entered values.
-if abs_total_quantity > 2 * resource.getBaseUnitQuantity():
-  return
-
-total_price = round(context.getTotalPrice(), precision)
 account_type_dict = {}
+source_exchange_ratio = None
+destination_exchange_ratio = None
+
 
 for line in line_list:
+  if not destination_exchange_ratio and line.getDestinationTotalAssetPrice():
+    destination_exchange_ratio = line.getDestinationTotalAssetPrice() / line.getQuantity()
+  if not source_exchange_ratio and line.getSourceTotalAssetPrice():
+    source_exchange_ratio = line.getSourceTotalAssetPrice() / line.getQuantity()
+
   for account in (line.getSourceValue(portal_type='Account'),
       line.getDestinationValue(portal_type='Account'),):
     account_type_dict.setdefault(line, set()).add(
       account is not None and account.getAccountTypeValue() or None)
 
+# find asset line which will be used later
 account_type = context.getPortalObject().portal_categories.account_type
 receivable_type = account_type.asset.receivable
 payable_type = account_type.liability.payable
-line_to_adjust = None
 
 asset_line = None
 for line, account_type_list in account_type_dict.iteritems():
@@ -62,20 +48,39 @@ for line, account_type_list in account_type_dict.iteritems():
       asset_line = line
       break
 
-if not asset_line:
+def roundLine(resource, get_method, set_method, exchange_ratio):
+  precision = context.getQuantityPrecisionFromResource(resource)
+  total_quantity = 0.0
+  for line in line_list:
+    line_quantity = round(getattr(line, get_method)(), precision)
+    getattr(line, set_method)(line_quantity)
+    total_quantity += line_quantity
+
+  abs_total_quantity = abs(round(total_quantity, precision))
+  # The total quantity should be zero with a little error, if simulation has been
+  # completely applied, because the debit and the credit must be balanced. However,
+  # this is not the case, if the delivery is divergent, as the builder does not
+  # adopt prevision automatically, when a conflict happens between the simulation
+  # and user-entered values.
+  if abs_total_quantity > 2 * context.restrictedTraverse(resource).getBaseUnitQuantity():
+    return
+
+  total_price = round(context.getTotalPrice() * exchange_ratio, precision)
+  if not asset_line:
     assert total_price == 0.0 and total_quantity == 0.0, \
       'receivable or payable line not found.'
     return
 
-# If we have a difference between total credit and total debit, one line is 
-# chosen to add or remove this difference. The payable or receivable is chosen 
-# only if this line is not matching with invoice total price, because total price
-# comes from all invoice lines (quantity * price) and it is what should be payed.
-# And payable or receivable line is the record in the accounting of what has 
-# to be payed. Then, we must not touch it when it already matches.
-# If is not a payable or receivable, vat or other line (ie. income) is used.
-if abs_total_quantity != 0:
-  if round(abs(asset_line.getQuantity()), precision) != round(abs(context.getTotalPrice()), precision):
+  # If we have a difference between total credit and total debit, one line is
+  # chosen to add or remove this difference. The payable or receivable is chosen
+  # only if this line is not matching with invoice total price, because total price
+  # comes from all invoice lines (quantity * price) and it is what should be payed.
+  # And payable or receivable line is the record in the accounting of what has
+  # to be payed. Then, we must not touch it when it already matches.
+  # If is not a payable or receivable, vat or other line (ie. income) is used.
+  line_to_adjust = None
+  if abs_total_quantity != 0:
+    if round(abs(getattr(asset_line, get_method)()), precision) != round(abs(context.getTotalPrice()) * exchange_ratio, precision):
       # adjust payable or receivable
       for line in line_list:
         if receivable_type in account_type_dict[line] or \
@@ -97,6 +102,20 @@ if abs_total_quantity != 0:
           line_to_adjust = line
           break
 
-if line_to_adjust is not None:
-  line_to_adjust.setQuantity(
-    round(line_to_adjust.getQuantity() - total_quantity, precision))
+  if line_to_adjust is not None:
+    getattr(line_to_adjust, set_method)(
+      round(getattr(line_to_adjust, get_method)() - total_quantity, precision))
+
+
+
+resource = context.getResource()
+# Round Debit/credit
+roundLine(resource, 'getQuantity', 'setQuantity', 1)
+# Round source asset price
+if source_exchange_ratio:
+  source_section_price_currency = context.getSourceSectionValue().getPriceCurrency()
+  roundLine(source_section_price_currency, 'getSourceTotalAssetPrice', 'setSourceTotalAssetPrice', source_exchange_ratio)
+# Round destination asset price
+if destination_exchange_ratio:
+  destination_section_price_currency = context.getDestinationSectionValue().getPriceCurrency()
+  roundLine(destination_section_price_currency, 'getDestinationTotalAssetPrice', 'setDestinationTotalAssetPrice', destination_exchange_ratio)

bt5/erp5_invoicing/DocumentTemplateItem/portal_components/document.erp5.InvoiceTransactionSimulationRule.py

@@ -124,12 +124,16 @@ class InvoiceTransactionRuleMovementGenerator(MovementGeneratorMixin):
                                       .getParentValue().getParentValue()
 
     kw = {'delivery': None, 'resource': resource, 'price': 1}
+    return kw
 
-    if resource is not None:
-      #set asset_price on movement when resource is different from price
-      #currency of the source/destination section
+  def getGeneratedMovementList(self, movement_list=None, rounding=False):
+    movement_list = super(InvoiceTransactionRuleMovementGenerator, self).getGeneratedMovementList(movement_list=movement_list, rounding=rounding)
+    portal = self._applied_rule.getPortalObject()
     for arrow in 'destination', 'source':
-        section = input_movement.getDefaultAcquiredValue(arrow + '_section')
+      for movement in movement_list:
+        resource = movement.getResource()
+        if resource is not None:
+          section = movement.getDefaultAcquiredValue(arrow + '_section')
           if section is not None:
             try:
               currency_url = section.getPriceCurrency()
@@ -138,15 +142,17 @@ class InvoiceTransactionRuleMovementGenerator(MovementGeneratorMixin):
             if currency_url not in (None, resource):
               currency = portal.unrestrictedTraverse(currency_url)
               exchange_ratio = currency.getPrice(
-              context=input_movement.asContext(
+                context=movement.asContext(
                   categories=('price_currency/' + currency_url,
                               'resource/' + resource)))
               if exchange_ratio is not None:
-              kw[arrow + '_total_asset_price'] = round(
-                exchange_ratio * input_movement.getQuantity(),
-                currency.getQuantityPrecision())
+                if arrow == 'destination':
+                  sign = 1
+                else:
+                  sign = -1
+                movement.setProperty(arrow + '_total_asset_price', movement.getQuantity() * exchange_ratio * sign)
 
-    return kw
+    return movement_list
 
   def _getInputMovementList(self, movement_list=None, rounding=False):
     simulation_movement = self._applied_rule.getParentValue()