From 13b2a764efd96efd6369d10a5870f563f05f5b25 Mon Sep 17 00:00:00 2001
From: yuzhiran <contact@yuzhiran.com>
Date: Mon, 22 Jun 2026 12:14:31 +0800
Subject: [PATCH] fix(admin): partial _id fuzzy search via $expr + $toString +
 $regexMatch

---
 backend/src/modules/admin/admin.controller.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/backend/src/modules/admin/admin.controller.ts b/backend/src/modules/admin/admin.controller.ts
index b231348..52c6bdd 100644
--- a/backend/src/modules/admin/admin.controller.ts
+++ b/backend/src/modules/admin/admin.controller.ts
@@ -88,10 +88,10 @@ export class AdminController {
         { email: { $regex: escaped, $options: 'i' } },
         { wxOpenid: { $regex: escaped, $options: 'i' } },
       ]
-      // 支持按 MongoDB _id 搜索（24位 hex）
-      if (/^[0-9a-f]{24}$/i.test(keyword)) {
-        filter.$or.push({ _id: keyword })
-      }
+      // 支持按 _id 模糊搜索（ObjectId → string → regex）
+      filter.$or.push({
+        $expr: { $regexMatch: { input: { $toString: '$_id' }, regex: escaped, options: 'i' } },
+      })
     }
     const skip = (Math.max(1, +page) - 1) * +limit
     const [users, total] = await Promise.all([