fix: rebuild stock change record

api_v1/serializers.py

@@ -0,0 +1,86 @@
+from rest_framework import serializers
+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
+
+
+class ProductStockChangeSerializer(serializers.Serializer):
+    """产品库存变动序列化器"""
+    product = serializers.IntegerField(help_text="产品ID")
+    quantity = serializers.ListField(
+        child=serializers.DecimalField(max_digits=10, decimal_places=2, min_value=Decimal('0.01')),
+        min_length=1,
+        help_text="数量列表，每个数量对应一条明细记录"
+    )
+
+    def validate_product(self, value: int) -> int:
+        """验证产品是否存在"""
+        try:
+            basic_info_models.Product.objects.get(id=value)
+        except basic_info_models.Product.DoesNotExist:
+            raise serializers.ValidationError(f"产品ID {value} 不存在")
+        return value
+
+
+class CreateStockChangeSerializer(serializers.Serializer):
+    """创建库存变动记录序列化器"""
+    stock_change_record_id = serializers.IntegerField(
+        required=False, 
+        allow_null=True,
+        help_text="库存变动记录ID，如果不提供则创建新记录"
+    )
+    products = ProductStockChangeSerializer(many=True, help_text="产品列表")
+
+    def validate_stock_change_record_id(self, value: int) -> int:
+        """验证库存变动记录是否存在"""
+        if value is not None:
+            try:
+                stock_models.StockChangeRecord.objects.get(id=value)
+            except stock_models.StockChangeRecord.DoesNotExist:
+                raise serializers.ValidationError(f"库存变动记录ID {value} 不存在")
+        return value
+
+    def validate_products(self, value: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
+        """验证产品列表"""
+        if not value:
+            raise serializers.ValidationError("产品列表不能为空")
+        
+        # 检查是否有重复的产品ID
+        product_ids = [item['product'] for item in value]
+        if len(product_ids) != len(set(product_ids)):
+            raise serializers.ValidationError("产品列表中存在重复的产品ID")
+        
+        return value
+
+
+class StockChangeRecordResponseSerializer(serializers.ModelSerializer):
+    """库存变动记录响应序列化器"""
+    
+    class Meta:
+        model = stock_models.StockChangeRecord
+        fields = [
+            'id', 'type', 'warehouse', 'source_type', 'source_id', 
+            'is_finished', 'finished_at', 'created_at', 'updated_at'
+        ]
+
+
+class StockChangeDetailResponseSerializer(serializers.ModelSerializer):
+    """库存变动明细响应序列化器"""
+    product_name = serializers.CharField(source='product.name', read_only=True)
+    unit_display = serializers.CharField(source='get_unit_display', read_only=True)
+    
+    class Meta:
+        model = stock_models.StockChangeDetail
+        fields = [
+            'id', 'product', 'product_name', 'quantity', 
+            'unit', 'unit_display', 'stock_change_record'
+        ]
+
+
+class CreateStockChangeResponseSerializer(serializers.Serializer):
+    """创建库存变动记录响应序列化器"""
+    stock_change_record = StockChangeRecordResponseSerializer()
+    details = StockChangeDetailResponseSerializer(many=True)
+    message = serializers.CharField()
+    created_details_count = serializers.IntegerField()