fix: important bug with sorting when some of the values do not exist

Author: AVVS

package.json

@@ -1,6 +1,6 @@
 {
   "name": "redis-filtered-sort",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "Exports LUA script, which is able to perform multi filter operations, as well as sorts",
   "main": "index.js",
   "scripts": {

sorted-filtered-list.lua

@@ -148,7 +148,8 @@ if rcall("EXISTS", PSSKey) == 0 then
     local arr = {};
     for i,v in pairs(valuesToSort) do
       local metaKey = metadataKey:gsub("*", v, 1);
-      arr[v] = rcall("HGET", metaKey, hashKey);
+      -- defaults to empty string to avoid sorting problems
+      arr[v] = rcall("HGET", metaKey, hashKey) or '';
     end
 
     local function sortFuncASC(a, b)

test/docker-compose.yml

@@ -1,12 +1,12 @@
 redis:
-  image: redis:3.2.4-alpine
+  image: redis:3.2.7-alpine
   container_name: redis
   hostname: redis
   expose:
     - "6379"
 
 tester:
-  image: makeomatic/node:6.5.0
+  image: makeomatic/node:7.5.0
   links:
     - redis
   working_dir: /src