diff --git a/inventory-backend/app/services/outbound_service.py b/inventory-backend/app/services/outbound_service.py
index 23f0fe1..327ae2a 100644
--- a/inventory-backend/app/services/outbound_service.py
+++ b/inventory-backend/app/services/outbound_service.py
@@ -250,9 +250,9 @@ class OutboundService:
             ).subquery()
 
             # 合并三种来源的匹配单号
-            all_matches = db.session.query(buy_match.outbound_no).union(
-                db.session.query(semi_match.outbound_no),
-                db.session.query(product_match.outbound_no)
+            all_matches = db.session.query(buy_match.c.outbound_no).union(
+                db.session.query(semi_match.c.outbound_no),
+                db.session.query(product_match.c.outbound_no)
             ).subquery()
 
             # 主搜索条件：单号、领用人、SKU + 物料名称/规格匹配的单号
diff --git a/inventory-backend/app/services/trans_service.py b/inventory-backend/app/services/trans_service.py
index 104acc6..af17500 100644
--- a/inventory-backend/app/services/trans_service.py
+++ b/inventory-backend/app/services/trans_service.py
@@ -242,9 +242,9 @@ class TransService:
             ).subquery()
 
             # 合并三种来源的匹配 ID
-            all_matches = db.session.query(buy_match.id).union(
-                db.session.query(semi_match.id),
-                db.session.query(product_match.id)
+            all_matches = db.session.query(buy_match.c.id).union(
+                db.session.query(semi_match.c.id),
+                db.session.query(product_match.c.id)
             ).subquery()
 
             # 主搜索条件：借用人、SKU、单号 + 物料名称/规格匹配