From 2fefd8cbbfd2141361f4d74bad24c19b724d8fbd Mon Sep 17 00:00:00 2001
From: BaoyangChai <baoyangchai@gmail.com>
Date: Tue, 12 Feb 2019 18:53:34 +0800
Subject: [PATCH] update len

---
 orm/db.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/orm/db.go b/orm/db.go
index e488a5ab..8e7e93bb 100644
--- a/orm/db.go
+++ b/orm/db.go
@@ -631,10 +631,10 @@ func (d *dbBase) Update(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
 	}
 
 	if find {
-		newSetNames := make([]string, 0, 0)
+		newSetNames := make([]string, 0, len(setNames)-1)
 		newSetNames = append(setNames[0:index], setNames[index+1:]...)
 		setNames = newSetNames
-		newSetValues := make([]interface{}, 0, 0)
+		newSetValues := make([]interface{}, 0, len(setNames)-1)
 		newSetValues = append(setValues[0:index], setValues[index+1:]...)
 		setValues = newSetValues