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

api_v1/views/business/statements/serializers.py

@@ -1,5 +1,7 @@
 from rest_framework import serializers
 
+from business import services as business_services
+
 
 class StatementRecordSerializer(serializers.Serializer):
     source_type = serializers.CharField()
@@ -39,3 +41,17 @@ class StatementResponseSerializer(serializers.Serializer):
         return data
 
 
+class StatementRecordQuerySerializer(serializers.Serializer):
+    """单条对账记录查询的参数序列化器"""
+
+    counterparty_type = serializers.ChoiceField(
+        choices=business_services.STATEMENT_COUNTERPARTY_CHOICES,
+        help_text='客户/供应商类型（customer/supplier）',
+    )
+    counterparty_id = serializers.IntegerField(min_value=1, help_text='客户或供应商 ID')
+    order_type = serializers.ChoiceField(
+        choices=business_services.STATEMENT_ORDER_TYPE_CHOICES,
+        help_text='来源单据类型（如 sales_order）',
+    )
+    order_id = serializers.IntegerField(min_value=1, help_text='来源单据 ID')
+