From 85102fb26a2aa4dbc79b9d23dfa50c5f17ea7171 Mon Sep 17 00:00:00 2001
From: "jimmy.callin" <jimmy.callin@gmail.com>
Date: Sun, 23 Sep 2018 21:04:17 +0200
Subject: [PATCH] Fix: when alias returns a falsy value, it may return
 undefined

---
 packages/apollo-link-state/src/index.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/apollo-link-state/src/index.ts b/packages/apollo-link-state/src/index.ts
index 01acef4..27ecd4d 100644
--- a/packages/apollo-link-state/src/index.ts
+++ b/packages/apollo-link-state/src/index.ts
@@ -87,8 +87,10 @@ export const withClientState = (
         const aliasNeeded = resultKey !== fieldName;
 
         // If aliasedValue is defined, some other link or server already returned a value
-        if (aliasedNode !== undefined || preAliasingNode !== undefined) {
-          return aliasedNode || preAliasingNode;
+        if (aliasedNode !== undefined) {
+          return aliasedNode;
+        } else if (preAliasingNode !== undefined) {
+          return preAliasingNode;
         }
 
         // Look for the field in the custom resolver map