fix bug.

app/api/endpoints/order.py

@@ -46,7 +46,8 @@ def calculate_price(price_request: OrderPriceCalculateRequest,user: UserDB,db: S
         """
         # 计算所有包裹中的取件码总数
         package_count = sum(
-            len(package.pickup_codes.split(','))
+            # 如果package.pickup_codes是空字符串，则取0
+            0 if len(package.pickup_codes.split(',')) == 0 else len(package.pickup_codes.split(','))
             for package in price_request.packages
                 if package.pickup_codes
         )
@@ -188,7 +189,8 @@ async def create_order(
     
     # 创建订单包裹
     for package in order.price_request.packages:
-        
+        # 如果包裹有取件码，则创建包裹
+        if len(package.pickup_codes) > 0:
             station = db.query(StationDB).filter(
                 StationDB.id == package.station_id
             ).first()