bug PL qt double * fee rate

modules/purchase_trade/purchase.py

@@ -1468,14 +1468,21 @@ class Line(metaclass=PoolMeta):
         lines = sum(args[::2], [])
         for line in lines:
             if line.id in old_values:
-                old = Decimal(old_values[line.id] or 0)
                 new = Decimal(line.quantity_theorical or 0)
-                delta = new - old
+                virtual_lots = [lot for lot in (line.lots or []) if lot.lot_type == 'virtual']
+                if not virtual_lots:
+                    continue
+                vlot = virtual_lots[0]
+                # Initializing quantity_theorical after virtual-lot creation
+                # must not add the line quantity a second time.
+                old = old_values[line.id]
+                baseline = (
+                    Decimal(old)
+                    if old is not None
+                    else Decimal(vlot.get_current_quantity_converted() or 0)
+                )
+                delta = new - baseline
                 if delta > 0:
-                    virtual_lots = [lot for lot in (line.lots or []) if lot.lot_type == 'virtual']
-                    if not virtual_lots:
-                        continue
-                    vlot = virtual_lots[0]
                     new_qty = round(Decimal(vlot.get_current_quantity_converted() or 0) + delta, 5)
                     vlot.set_current_quantity(new_qty, new_qty, 1)
                     Lot.save([vlot])
@@ -1498,10 +1505,6 @@ class Line(metaclass=PoolMeta):
                         lqt.lot_unit = line.unit
                         LotQt.save([lqt])
                 elif delta < 0:
-                    virtual_lots = [lot for lot in (line.lots or []) if lot.lot_type == 'virtual']
-                    if not virtual_lots:
-                        continue
-                    vlot = virtual_lots[0]
                     decrease = abs(delta)
                     lqts = LotQt.search([
                         ('lot_p', '=', vlot.id),

modules/purchase_trade/tests/test_module.py

@@ -181,6 +181,49 @@ class PurchaseTradeTestCase(ModuleTestCase):
         create_derivatives.assert_not_called()
         PoolMock.return_value.get.assert_not_called()
 
+    def test_create_pnl_fee_from_line_accepts_missing_rate_amount(self):
+        'purchase fee valuation treats an uncomputed rate amount as zero'
+        Valuation = Pool().get('valuation.valuation')
+        currency = Mock(id=1)
+        unit = Mock(id=2)
+        product = Mock(id=3, name='Financing fees')
+        supplier = Mock(id=4)
+        lot = Mock(id=5, sale_line=None, lot_type='virtual')
+        lot.get_current_quantity_converted.return_value = Decimal('10')
+        fee = Mock(
+            product=product,
+            supplier=supplier,
+            type='budgeted',
+            p_r='pay',
+            mode='rate',
+            price=Decimal('10'),
+            currency=currency,
+            shipment_in=None,
+            sale_line=None,
+            unit=unit,
+        )
+        fee.get_amount.return_value = None
+        line = Mock(
+            id=6,
+            lots=[lot],
+            get_matched_lines=Mock(return_value=[]),
+            purchase=Mock(id=7, currency=currency),
+            unit=unit,
+        )
+        fee_lots = Mock()
+        fee_lots.search.return_value = [Mock(fee=fee)]
+
+        with patch('trytond.modules.purchase_trade.valuation.Pool') as PoolMock:
+            PoolMock.return_value.get.side_effect = lambda name: {
+                'ir.date': Mock(today=Mock(return_value=datetime.date(2026, 4, 23))),
+                'currency.currency': Mock(),
+                'fee.lots': fee_lots,
+            }[name]
+
+            values = Valuation.create_pnl_fee_from_line(line)
+
+        self.assertEqual(values[0]['amount'], Decimal('0'))
+
     def test_create_pnl_price_from_line_ignores_finished_matched_sale_line(self):
         'purchase valuation does not add sale-side pnl when the matched sale line is finished'
         Valuation = Pool().get('valuation.valuation')
@@ -693,6 +736,42 @@ class PurchaseTradeTestCase(ModuleTestCase):
             with self.assertRaises(UserError):
                 SaleLine.write([line], {'quantity_theorical': Decimal('8')})
 
+    def test_purchase_line_write_initial_theorical_qty_does_not_double_open_lot(self):
+        'purchase line write does not re-add quantity when initializing contractual qty'
+        PurchaseLine = Pool().get('purchase.line')
+        line = Mock(id=3, quantity_theorical=None)
+        vlot = Mock(id=101, lot_type='virtual')
+        vlot.get_current_quantity_converted.return_value = Decimal('10')
+        line.lots = [vlot]
+
+        lot_model = Mock()
+        lotqt_model = Mock()
+
+        with patch(
+                'trytond.modules.purchase_trade.purchase.Pool'
+                ) as PoolMock, patch(
+                    'trytond.modules.purchase_trade.purchase.super'
+                ) as super_mock:
+            PoolMock.return_value.get.side_effect = lambda name: {
+                'lot.lot': lot_model,
+                'lot.qt': lotqt_model,
+            }[name]
+
+            def fake_super_write(*args):
+                for records, values in zip(args[::2], args[1::2]):
+                    if 'quantity_theorical' in values:
+                        for record in records:
+                            record.quantity_theorical = values['quantity_theorical']
+
+            super_mock.return_value.write.side_effect = fake_super_write
+
+            PurchaseLine.write(
+                [line], {'quantity_theorical': Decimal('10')})
+
+        vlot.set_current_quantity.assert_not_called()
+        lot_model.save.assert_not_called()
+        lotqt_model.save.assert_not_called()
+
     def test_party_execution_achieved_percent_uses_real_area_statistics(self):
         'party execution achieved percent reflects the controller share in its area'
         PartyExecution = Pool().get('party.execution')

modules/purchase_trade/valuation.py

@@ -639,6 +639,11 @@ class ValuationBase(ModelSQL):
                 result.extend(budgeted_fees)
         return result
 
+    @classmethod
+    def _fee_amount_or_zero(cls, fee):
+        amount = fee.get_amount() if hasattr(fee, 'get_amount') else fee.amount
+        return Decimal(amount or 0)
+    
     @classmethod
     def create_pnl_fee_from_line(cls, line):
         fee_lines = []
@@ -664,7 +669,7 @@ class ValuationBase(ModelSQL):
                 qty = round(lot.get_current_quantity_converted(), 5)
                 if sf.mode == 'ppack' or sf.mode == 'rate':
                     price = sf.price
-                    amount = sf.amount * sign
+                    amount = cls._fee_amount_or_zero(sf) * sign
                 elif sf.mode == 'lumpsum':
                     price = sf.price
                     amount = sf.price * sign
@@ -723,7 +728,7 @@ class ValuationBase(ModelSQL):
                 qty = round(lot.get_current_quantity_converted(), 5)
                 if sf.mode == 'ppack' or sf.mode == 'rate':
                     price = sf.price
-                    amount = sf.amount * sign
+                    amount = cls._fee_amount_or_zero(sf) * sign
                 elif sf.mode == 'lumpsum':
                     price = sf.price
                     amount = sf.price * sign