feat: add discount_amount to payment_order and receipt_order, and change total_amount logic

api_v1/serializers.py

@@ -3,6 +3,7 @@ from decimal import Decimal
 from typing import List, Dict, Any
 from stock import models as stock_models
 from basic_info import models as basic_info_models
+from api_v1.utils.media import build_public_media_url
 from . import models as api_models
 from .enums import PrintCountObjectType
 
@@ -254,9 +255,11 @@ class UploadedFileSerializer(serializers.ModelSerializer):
         """获取文件完整URL"""
         if obj.path:
             request = self.context.get('request')
-            if request:
-                return request.build_absolute_uri(obj.path.url)
-            return obj.path.url
+            try:
+                raw_value = obj.path.url
+            except ValueError:
+                raw_value = obj.path.name
+            return build_public_media_url(raw_value, request=request)
         return None