fix(configurator): lot pricing robust in totals + SO-create (not reliant on onchange)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

fusion_plating/fusion_plating_configurator/tests/test_charge_tax_lot.py

@@ -54,3 +54,14 @@ class TestChargeTaxLot(TransactionCase):
         })
         line._onchange_lot_pricing()
         self.assertEqual(line.unit_price, 2.0)
+
+    def test_lot_line_subtotal_uses_lot_total(self):
+        # Even if unit_price wasn't derived (onchange didn't fire), the
+        # summary subtotal uses the flat lot_total for lot-priced lines.
+        wiz = self._make_wizard(tax_id=self.tax13.id)
+        self.env['fp.direct.order.line'].create({
+            'wizard_id': wiz.id, 'quantity': 500, 'lot_total': 1000.0,
+            'is_lot_priced': True, 'unit_price': 0.0,
+        })
+        wiz.invalidate_recordset()
+        self.assertEqual(wiz.total_subtotal, 1000.0)

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard.py

@@ -403,6 +403,8 @@ class FpDirectOrderWizard(models.Model):
     @api.depends(
         'line_ids.quantity',
         'line_ids.unit_price',
+        'line_ids.is_lot_priced',
+        'line_ids.lot_total',
         'charge_amount',
         'tooling_charge',
         'tax_id',
@@ -419,7 +421,8 @@ class FpDirectOrderWizard(models.Model):
         """
         for rec in self:
             subtotal = sum(
-                (l.quantity or 0) * (l.unit_price or 0.0)
+                (l.lot_total or 0.0) if l.is_lot_priced
+                else (l.quantity or 0) * (l.unit_price or 0.0)
                 for l in rec.line_ids
             )
             charge = rec.charge_amount or rec.tooling_charge or 0.0
@@ -853,7 +856,11 @@ class FpDirectOrderWizard(models.Model):
                 'product_id': product.id,
                 'name': line_desc,
                 'product_uom_qty': line.quantity,
-                'price_unit': line.unit_price or 0.0,
+                'price_unit': (
+                    (line.lot_total / line.quantity)
+                    if line.is_lot_priced and line.quantity
+                    else (line.unit_price or 0.0)
+                ),
                 'x_fc_part_catalog_id': part.id,
                 'x_fc_description_template_id': line.description_template_id.id or False,
                 'x_fc_internal_description': line.internal_description or False,