diff --git a/.gitignore b/.gitignore
index 3c3629e..cd98105 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules
+.idea/
\ No newline at end of file
diff --git a/index.js b/index.js
index ab8675b..7b6df8f 100644
--- a/index.js
+++ b/index.js
@@ -1,19 +1,28 @@
 module.exports = function (app, db) {
+  var dbError = false
+  db.on('error', function (err) {
+    dbError = true
+  })
+  db.on('connect', function () {
+    dbError = false
+  })
   return function (opts) {
     var middleware = function (req, res, next) {
+      if(dbError === true) return next()
       if (opts.whitelist && opts.whitelist(req)) return next()
       opts.lookup = Array.isArray(opts.lookup) ? opts.lookup : [opts.lookup]
       opts.onRateLimited = typeof opts.onRateLimited === 'function' ? opts.onRateLimited : function (req, res, next) {
         res.status(429).send('Rate limit exceeded')
       }
       var lookups = opts.lookup.map(function (item) {
-        return item + ':' + item.split('.').reduce(function (prev, cur) {
+        return item.split('.').reduce(function (prev, cur) {
           return prev[cur]
         }, req)
       }).join(':')
       var path = opts.path || req.path
       var method = (opts.method || req.method).toLowerCase()
-      var key = 'ratelimit:' + path + ':' + method + ':' + lookups
+      var prefix = opts.prefix_redis_key || 'ratelimit:' + path + ':' + method;
+      var key =  prefix + ':' + lookups
       db.get(key, function (err, limit) {
         if (err && opts.ignoreErrors) return next()
         var now = Date.now()