feat: field pre_purchase_order_id for purchase_order (allow null)

business/services.py

@@ -181,6 +181,7 @@ def create_purchase_order(
     items: List[Dict[str, Any]],
     remarks: str | None = '',
     created_by=None,
+    from_pre_purchase_order_id: int | None = None,
 ) -> models.PurchaseOrder:
     """
     创建采购订单并触发异步创建入库单任务。
@@ -214,6 +215,7 @@ def create_purchase_order(
             operator=operator,
             warehouse=warehouse,
             remarks=remarks,
+            from_pre_purchase_order_id=from_pre_purchase_order_id,
         )
         bulk_objects = [
             models.PurchaseOrderItem(
@@ -246,6 +248,7 @@ def update_purchase_order(
     warehouse: basic_info_models.WareHouse | None = None,
     items: List[Dict[str, Any]] | None = None,
     remarks: str | None = '',
+    from_pre_purchase_order_id: int | None = None,
 ) -> models.PurchaseOrder:
     """
     更新采购订单（仅限审批中状态）。
@@ -273,8 +276,17 @@ def update_purchase_order(
         purchase_order.purchase_date = new_order_date
         purchase_order.warehouse = new_warehouse
         purchase_order.remarks = remarks
+        if from_pre_purchase_order_id is not None:
+            purchase_order.from_pre_purchase_order_id = from_pre_purchase_order_id
         purchase_order.save(
-            update_fields=['supplier', 'purchase_date', 'warehouse', 'remarks', 'updated_at']
+            update_fields=[
+                'supplier',
+                'purchase_date',
+                'warehouse',
+                'remarks',
+                'from_pre_purchase_order_id',
+                'updated_at',
+            ]
         )
 
         purchase_order.items.all().delete()