From 4ea5fd2791df59bd46bc6ff8f073e18d31b2fb1c Mon Sep 17 00:00:00 2001
From: Lunny Xiao <xiaolunwen@gmail.com>
Date: Mon, 2 Sep 2013 10:06:32 +0800
Subject: [PATCH] improved Asc & Desc

---
 engine.go  |  8 ++++----
 session.go | 10 ++++++----
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/engine.go b/engine.go
index 0645ac35..c54e7aa9 100644
--- a/engine.go
+++ b/engine.go
@@ -179,16 +179,16 @@ func (engine *Engine) Limit(limit int, start ...int) *Session {
 	return session.Limit(limit, start...)
 }
 
-func (engine *Engine) Desc(colName string) *Session {
+func (engine *Engine) Desc(colNames ...string) *Session {
 	session := engine.NewSession()
 	session.IsAutoClose = true
-	return session.Desc(colName)
+	return session.Desc(colNames...)
 }
 
-func (engine *Engine) Asc(colName string) *Session {
+func (engine *Engine) Asc(colNames ...string) *Session {
 	session := engine.NewSession()
 	session.IsAutoClose = true
-	return session.Asc(colName)
+	return session.Asc(colNames...)
 }
 
 func (engine *Engine) OrderBy(order string) *Session {
diff --git a/session.go b/session.go
index bfc1798b..582e0464 100644
--- a/session.go
+++ b/session.go
@@ -85,19 +85,21 @@ func (session *Session) OrderBy(order string) *Session {
 	return session
 }
 
-func (session *Session) Desc(colName string) *Session {
+func (session *Session) Desc(colNames ...string) *Session {
 	if session.Statement.OrderStr != "" {
 		session.Statement.OrderStr += ", "
 	}
-	session.Statement.OrderStr += colName + " desc"
+	sql := strings.Join(colNames, " desc, ")
+	session.Statement.OrderStr += sql + " desc"
 	return session
 }
 
-func (session *Session) Asc(colName string) *Session {
+func (session *Session) Asc(colNames ...string) *Session {
 	if session.Statement.OrderStr != "" {
 		session.Statement.OrderStr += ", "
 	}
-	session.Statement.OrderStr += colName + " asc"
+	sql := strings.Join(colNames, " asc, ")
+	session.Statement.OrderStr += sql + " asc"
 	return session
 }