closes #5571

src/database/mongo/sorted.js

@@ -241,7 +241,7 @@ module.exports = function (db, module) {
 
 	module.sortedSetScore = function (key, value, callback) {
 		if (!key) {
-			return callback();
+			return callback(null, null);
 		}
 		value = helpers.valueToString(value);
 		db.collection('objects').findOne({ _key: key, value: value }, { fields: { _id: 0, score: 1 } }, function (err, result) {
@@ -274,7 +274,7 @@ module.exports = function (db, module) {
 
 	module.sortedSetScores = function (key, values, callback) {
 		if (!key) {
-			return callback();
+			return callback(null, null);
 		}
 		values = values.map(helpers.valueToString);
 		db.collection('objects').find({ _key: key, value: { $in: values } }, { _id: 0, value: 1, score: 1 }).toArray(function (err, result) {

src/database/redis/helpers.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var helpers = {};
+var helpers = module.exports;
 
 helpers.multiKeys = function (redisClient, command, keys, callback) {
 	callback = callback || function () {};
@@ -15,7 +15,7 @@ helpers.multiKeysValue = function (redisClient, command, keys, value, callback)
 	callback = callback || function () {};
 	var multi = redisClient.multi();
 	for (var i = 0; i < keys.length; i += 1) {
-		multi[command](keys[i], value);
+		multi[command](String(keys[i]), String(value));
 	}
 	multi.exec(callback);
 };
@@ -24,7 +24,7 @@ helpers.multiKeyValues = function (redisClient, command, key, values, callback)
 	callback = callback || function () {};
 	var multi = redisClient.multi();
 	for (var i = 0; i < values.length; i += 1) {
-		multi[command](key, values[i]);
+		multi[command](String(key), String(values[i]));
 	}
 	multi.exec(callback);
 };
@@ -35,5 +35,3 @@ helpers.resultsToBool = function (results) {
 	}
 	return results;
 };
-
-module.exports = helpers;

src/database/redis/sorted.js

@@ -124,8 +124,12 @@ module.exports = function (redisClient, module) {
 	};
 
 	module.sortedSetScore = function (key, value, callback) {
+		if (!key || value === undefined) {
+			return callback(null, null);
+		}
+
 		redisClient.zscore(key, value, function (err, score) {
-			callback(err, !err ? parseFloat(score) : undefined);
+			callback(err, !err ? parseFloat(score) : null);
 		});
 	};