feat: added print_count api, added merchant setting model, added manual mode setting for purchase order

api_v1/serializers.py

@@ -4,6 +4,7 @@ from typing import List, Dict, Any
 from stock import models as stock_models
 from basic_info import models as basic_info_models
 from . import models as api_models
+from .enums import PrintCountObjectType
 
 
 class ProductStockChangeSerializer(serializers.Serializer):
@@ -193,4 +194,25 @@ class FileUploadSerializer(serializers.Serializer):
         if value.size > max_size:
             raise serializers.ValidationError(f'文件大小不能超过 {max_size // (1024*1024)}MB')
         
-        return value
+        return value
+
+
+class PrintCountDeltaSerializer(serializers.Serializer):
+    """打印次数增量请求"""
+
+    object_type = serializers.ChoiceField(choices=PrintCountObjectType.choices)
+    object_id = serializers.IntegerField(min_value=1)
+    delta = serializers.CharField(required=False, allow_null=True, allow_blank=True)
+
+    def validate(self, attrs: Dict[str, Any]) -> Dict[str, Any]:
+        raw_delta = attrs.get('delta')
+        try:
+            delta_value = int(raw_delta)
+        except (TypeError, ValueError):
+            delta_value = 1
+
+        if delta_value < 1:
+            delta_value = 1
+
+        attrs['delta'] = delta_value
+        return attrs