From 5e6c79ec78d9a44dc3e7c3d366ed33914b24964f Mon Sep 17 00:00:00 2001
From: Clemens Tolboom <clemens@build2be.com>
Date: Sun, 27 May 2018 16:24:30 +0200
Subject: [PATCH] Add check for Query document. Credits to @Aides359 from #31

Credits to @Aides359 from #31
---
 src/network_interface/ApolloNetworkInterface.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/network_interface/ApolloNetworkInterface.ts b/src/network_interface/ApolloNetworkInterface.ts
index a94ae5c..dfd76fc 100644
--- a/src/network_interface/ApolloNetworkInterface.ts
+++ b/src/network_interface/ApolloNetworkInterface.ts
@@ -58,6 +58,11 @@ export function addPersistedQueries(networkInterface: NetworkInterface, queryMap
   return Object.assign(networkInterface, {
     query: (request: Request): Promise<ExecutionResult> => {
       const queryDocument = request.query;
+
+      if (queryDocument === undefined) {
+        return Promise.reject(new Error('No query document was provided'));
+      }
+
       const queryKey = getQueryDocumentKey(queryDocument);
 
       if (!queryMap[queryKey]) {