From d0379d615c4c8e91e76ace4c7f728f3ba2d171fb Mon Sep 17 00:00:00 2001
From: colaftc <colaftc@gmail.com>
Date: Wed, 4 Feb 2026 15:17:02 +0800
Subject: [PATCH] fix: stock-snapshots api and service calc wrong result

---
 stock/services.py | 3 +--
 stock/tests.py    | 2 ++
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/stock/services.py b/stock/services.py
index ca288e1..f949532 100644
--- a/stock/services.py
+++ b/stock/services.py
@@ -815,7 +815,6 @@ def create_stock_snapshot(stock_change_detail: models.StockChangeDetail, invento
         raise ValueError("无效的库存变动明细记录")
 
     delta = stock_change_detail.quantity if stock_change_detail.stock_change_record.is_incoming else -stock_change_detail.quantity
-    rolls_delta = 1 if stock_change_detail.stock_change_record.is_incoming else -1
 
     # 必须在库存变动发生后创建快照
     snapshot = models.StockSnapshot(
@@ -827,7 +826,7 @@ def create_stock_snapshot(stock_change_detail: models.StockChangeDetail, invento
         quantity_after=inventory.quantity,
         stock_change_record_id=stock_change_detail.stock_change_record.id,
         unit=stock_change_detail.unit,
-        num_of_rolls=inventory.num_of_rolls + rolls_delta,
+        num_of_rolls=inventory.num_of_rolls,
     )
     snapshot.save()
     logger.info(
diff --git a/stock/tests.py b/stock/tests.py
index f2cbfe2..6872808 100644
--- a/stock/tests.py
+++ b/stock/tests.py
@@ -241,6 +241,7 @@ class CreateStockSnapshotTestCase(StockServicesTestCase):
         self.assertEqual(snapshot.delta, 100)  # 入库数量为正
         self.assertEqual(snapshot.quantity_before, 50)  # 150 - 100
         self.assertEqual(snapshot.quantity_after, 150)
+        self.assertEqual(snapshot.num_of_rolls, self.inventory.num_of_rolls)
         self.assertEqual(snapshot.stock_change_record_id, self.stock_change_in.id)
         
         # 验证日志调用
@@ -257,6 +258,7 @@ class CreateStockSnapshotTestCase(StockServicesTestCase):
         self.assertEqual(snapshot.delta, -50)  # 出库数量为负
         self.assertEqual(snapshot.quantity_before, 200)  # 150 - (-50)
         self.assertEqual(snapshot.quantity_after, 150)
+        self.assertEqual(snapshot.num_of_rolls, self.inventory.num_of_rolls)
     
     def test_create_snapshot_with_invalid_detail(self):
         """测试使用无效明细记录创建快照"""