fix: quantity when converting to sales_order

business/pre_order_services.py

@@ -9,6 +9,7 @@ from django.core.exceptions import ValidationError
 from django.utils import timezone
 
 from basic_info import models as basic_info_models
+from stock import models as stock_models
 
 from . import models
 from . import services as business_services
@@ -437,11 +438,23 @@ def convert_pre_sales_order_to_sales_order(
         if not consume_ids:
             raise ValueError(f'明细 {item.id} 缺少配货库存明细')
 
+        quantity_from_details: Decimal | None = None
+        if consume_ids:
+            details_by_id = stock_models.StockChangeDetail.objects.filter(
+                id__in=consume_ids,
+                merchant=merchant,
+            ).in_bulk()
+            if details_by_id:
+                total = Decimal('0')
+                for detail in details_by_id.values():
+                    total += detail.quantity
+                quantity_from_details = total
+
         items_payload.append(
             {
                 'product_id': item.product_id,
                 'price': '0',
-                'quantity': str(item.quantity),
+                'quantity': str(quantity_from_details or item.quantity),
                 'unit': item.unit or None,
                 'color': item.color,
                 'spec': item.spec,