Merge branch 'feature-refactor' of yeshijie/im.doctor into feature-refactor

src/server/models/sessions/sessions.js

@@ -996,7 +996,7 @@ class Sessions extends RedisModel {
            function (lastFetchTime, callback) {
                if (!lastFetchTime) lastFetchTime = 0;
                let now = new Date().getTime();
                redis.zcountAsync(messagesByTimestampKey, lastFetchTime, now)
                redis.zcountAsync(messagesByTimestampKey, parseInt(lastFetchTime)+1, now)
                    .then(function (count) {
                        if (handler) {
                            handler(null, count);