From c3bb7d8b9d24d3508e075680d52199a5645fcd61 Mon Sep 17 00:00:00 2001
From: Offir Golan <offirgolan@gmail.com>
Date: Wed, 2 Aug 2017 14:21:52 -0700
Subject: [PATCH] Use keys to determine if there is a change or not

The previous implementation would fail if the value of the changed key
would be falsy.
---
 addon/-private/parachute-event.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/addon/-private/parachute-event.js b/addon/-private/parachute-event.js
index bd60e60..5721c3e 100644
--- a/addon/-private/parachute-event.js
+++ b/addon/-private/parachute-event.js
@@ -29,6 +29,7 @@ export default class ParachuteEvent {
   constructor(routeName, controller, changed = {}) {
     let { queryParams, queryParamsArray } = QueryParams.metaFor(controller);
     let state = QueryParams.stateFor(controller);
+    let changedKeys = keys(changed);
 
     /**
      * The route the event was fired from
@@ -41,7 +42,7 @@ export default class ParachuteEvent {
      * @type {object}
      */
     this.changed = queryParamsArray.reduce((changedParams, qp) => {
-      if (changed[qp.as]) {
+      if (changedKeys.includes(qp.as)) {
         changedParams[qp.key] = canInvoke(qp, 'deserialize') ? qp.deserialize(changed[qp.as]) : changed[qp.as];
       }
       return changedParams;