From 3c9cb06dbc4e57a0e2633046569e02be51755ea4 Mon Sep 17 00:00:00 2001
From: DXC <duxingchen@iris-rs.cn>
Date: Thu, 23 Apr 2026 13:34:41 +0800
Subject: [PATCH] fix: save_bom add db.session.flush() to fix unique constraint
 conflict

---
 inventory-backend/app/services/bom_service.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/inventory-backend/app/services/bom_service.py b/inventory-backend/app/services/bom_service.py
index 9e3bac1..616c218 100644
--- a/inventory-backend/app/services/bom_service.py
+++ b/inventory-backend/app/services/bom_service.py
@@ -194,6 +194,9 @@ class BomService:
         for rec in old_records:
             db.session.delete(rec)
 
+        # 【核心修复】：强制立即执行 DELETE 语句，为后续的 INSERT 腾出唯一键空间
+        db.session.flush()
+
         for child in children:
             bom = BomTable(
                 bom_no=bom_no,