From 70a0245e8937f3ebcff85d949d0cf04e7a50aa10 Mon Sep 17 00:00:00 2001
From: wangxiyu191 <910741878@qq.com>
Date: Thu, 28 Jul 2016 12:00:45 +0800
Subject: [PATCH] fix DetachedInstanceError on /admin/statistics (#133)

see http://stackoverflow.com/questions/15397680/detaching-sqlalchemy-instance-so-no-refresh-happens
---
 CTFd/admin.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CTFd/admin.py b/CTFd/admin.py
index 4cd71c9..4f0675c 100644
--- a/CTFd/admin.py
+++ b/CTFd/admin.py
@@ -733,7 +733,8 @@ def admin_stats():
     least_solved_chal = Challenges.query.add_columns(solves_cnt) \
         .outerjoin(solves_sub, solves_sub.columns.chalid == Challenges.id) \
         .order_by(solves_cnt.asc()).first()
-
+        
+    db.session.expunge_all()
     db.session.commit()
     db.session.close()