fix(scrap): completely refactor scan API return dict with safe getattr to prevent attribute errors

inventory-backend/app/api/v1/scrap.py

@@ -176,21 +176,18 @@ class ScrapService:
 
     @staticmethod
     def _format_stock(item, table_type):
-        """格式化库存查询结果"""
+        """格式化库存查询结果 - 使用安全 getattr 防止属性错误"""
-        stock_qty = float(item.stock_quantity) if item.stock_quantity else 0
-        avail_qty = float(item.available_quantity) if item.available_quantity else 0
-
         return {
-            'id': item.id,
+            'id': getattr(item, 'id', None),
-            'sku': item.sku,
+            'sku': getattr(item, 'sku', ''),
-            'barcode': item.barcode,
+            'barcode': getattr(item, 'barcode', getattr(item, 'bar_code', '')),
-            'name': item.base.name if item.base else '',
+            'name': item.base.name if getattr(item, 'base', None) else '',
-            'spec': item.base.spec_model if item.base else '',
+            'spec': item.base.spec_model if getattr(item, 'base', None) else '',
-            'category': item.base.category if item.base else '',
+            'category': item.base.category if getattr(item, 'base', None) else '',
-            'material_type': item.base.material_type if item.base else '',
+            'material_type': item.base.material_type if getattr(item, 'base', None) else '',
-            'warehouse_loc': item.warehouse_loc or '',
+            'warehouse_loc': getattr(item, 'warehouse_location', ''),
-            'stock_quantity': stock_qty,
+            'stock_quantity': float(getattr(item, 'stock_quantity', getattr(item, 'qty_stock', 0)) or 0),
-            'available_quantity': avail_qty,
+            'available_quantity': float(getattr(item, 'available_quantity', getattr(item, 'qty_available', 0)) or 0),
             'source_table': table_type,
         }