From de51b247f72faebf7aa343ca3ffbb98f34a103ac Mon Sep 17 00:00:00 2001
From: saga92 <yahao9210normal@126.com>
Date: Tue, 24 May 2016 09:41:34 +0800
Subject: [PATCH] make singleton thread safe

---
 dao/base.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dao/base.go b/dao/base.go
index e0476a7..5a74252 100644
--- a/dao/base.go
+++ b/dao/base.go
@@ -22,6 +22,7 @@ import (
 
 	"os"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/astaxie/beego/orm"
@@ -99,11 +100,12 @@ func InitDB() {
 }
 
 var globalOrm orm.Ormer
+var once sync.Once
 
 // GetOrmer :set ormer singleton
 func GetOrmer() orm.Ormer {
-	if globalOrm == nil {
+	once.Do(func() {
 		globalOrm = orm.NewOrm()
-	}
+	})
 	return globalOrm
 }