redis nil means 0

manager/roomManager.go

@@ -58,11 +58,12 @@ func (m *RoomManager) UpdateRoomUser(uid uint64, groupId string) error {
 func (m *RoomManager) GetLastRoomUserHeartbeat(uid uint64, groupId string) (int64, error) {
 	key := getRoomUserKey(groupId)
 	tx, err := m.RedisClient.ZScore(m.Ctx, key, fmt.Sprintf("%d", uid)).Result()
-	if err != nil {
+	if err != nil && err != redis.Nil {
 		mylogrus.MyLog.Errorf("GetLastRoomUserHeartbeat fail:%v", err)
 		return 0, err
 	}
-	return int64(tx), err
+	// redis nil means 0
+	return int64(tx), nil
 }
 
 func (m *RoomManager) GetAll() *map[string]string {