From 7f0b5e546c4694fdfce344f819d9c18f74e30401 Mon Sep 17 00:00:00 2001
From: anlicheng <anlicheng@xywy.com>
Date: Mon, 25 Sep 2023 17:37:13 +0800
Subject: [PATCH] fix buffer

---
 apps/iot/src/iot_database_buffer.erl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/iot/src/iot_database_buffer.erl b/apps/iot/src/iot_database_buffer.erl
index fc1cdff..0c5a367 100644
--- a/apps/iot/src/iot_database_buffer.erl
+++ b/apps/iot/src/iot_database_buffer.erl
@@ -66,7 +66,12 @@ init([]) ->
     {stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
     {stop, Reason :: term(), NewState :: #state{}}).
 handle_call({find_device, DeviceUUID}, _From, State = #state{devices_map = DevicesMap}) ->
-    {reply, maps:find(DeviceUUID, DevicesMap), State}.
+    case maps:take(DeviceUUID, DevicesMap) of
+        error ->
+            {reply, error, State};
+        {DeviceInfo, NDevicesMap} ->
+            {reply, {ok, DeviceInfo}, State#state{devices_map = NDevicesMap}}
+    end.
 
 %% @private
 %% @doc Handling cast messages