From de5f28ec56eca92dc96b835393008f0172d81bfb Mon Sep 17 00:00:00 2001
From: Himer <xishizhaohua@gmail.com>
Date: Tue, 23 Apr 2019 20:27:55 +0800
Subject: [PATCH] Update ch6-02-lock.md
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如果redis没有"counter"这个key,  getResp.Int64()会返回redis.Nil导致"counter"key无法设置
---
 ch6-cloud/ch6-02-lock.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ch6-cloud/ch6-02-lock.md b/ch6-cloud/ch6-02-lock.md
index daeb425..9d9fad2 100644
--- a/ch6-cloud/ch6-02-lock.md
+++ b/ch6-cloud/ch6-02-lock.md
@@ -176,7 +176,7 @@ func incr() {
 	// counter ++
 	getResp := client.Get(counterKey)
 	cntValue, err := getResp.Int64()
-	if err == nil {
+	if err == nil || err == redis.Nil {
 		cntValue++
 		resp := client.Set(counterKey, cntValue, 0)
 		_, err := resp.Result()