From 11165ce72725637f754805d94783e8d7d7714f33 Mon Sep 17 00:00:00 2001
From: Cloud Wu <cloudwu@gmail.com>
Date: Mon, 29 Mar 2021 14:27:37 +0800
Subject: [PATCH] fix #1368

---
 service/datacenterd.lua | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/service/datacenterd.lua b/service/datacenterd.lua
index 8a7b65a0..0c355186 100644
--- a/service/datacenterd.lua
+++ b/service/datacenterd.lua
@@ -15,7 +15,7 @@ end
 
 function command.QUERY(key, ...)
 	local d = database[key]
-	if d then
+	if d ~= nil then
 		return query(d, ...)
 	end
 end
@@ -59,7 +59,7 @@ end
 
 function command.UPDATE(...)
 	local ret, value = update(database, ...)
-	if ret or value == nil then
+	if ret ~= nil or value == nil then
 		return ret
 	end
 	local q = wakeup(wait_queue, ...)
@@ -97,7 +97,7 @@ skynet.start(function()
 	skynet.dispatch("lua", function (_, _, cmd, ...)
 		if cmd == "WAIT" then
 			local ret = command.QUERY(...)
-			if ret then
+			if ret ~= nil then
 				skynet.ret(skynet.pack(ret))
 			else
 				waitfor(wait_queue, ...)