From c5417c39aa6d7591d5a630bcc6ee4feab824c3f3 Mon Sep 17 00:00:00 2001
From: nodkz <pavel.chertorogov@gmail.com>
Date: Thu, 9 Nov 2017 00:11:57 +0600
Subject: [PATCH] fix: allow null in middleware list, improve flowtype
 definitions

---
 src/RelayNetworkLayer.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/RelayNetworkLayer.js b/src/RelayNetworkLayer.js
index 7bd2b8e..0eba2a9 100644
--- a/src/RelayNetworkLayer.js
+++ b/src/RelayNetworkLayer.js
@@ -16,13 +16,13 @@ export default class RelayNetworkLayer {
   fetchFn: FetchFunction;
   subscribeFn: ?SubscribeFunction;
 
-  constructor(middlewares: Middleware[] | Middleware, subscribeFn?: SubscribeFunction) {
-    this._middlewares = Array.isArray(middlewares) ? middlewares : [middlewares];
+  constructor(middlewares: Array<?Middleware>, subscribeFn?: SubscribeFunction) {
+    this._middlewares = Array.isArray(middlewares) ? (middlewares: any) : [middlewares];
     this.subscribeFn = subscribeFn;
 
     this.fetchFn = (operation, variables, cacheConfig, uploadables) => {
       const req = new RelayRequest(operation, variables, cacheConfig, uploadables);
-      return fetchWithMiddleware(req, this._middlewares);
+      return fetchWithMiddleware(req, this._middlewares.filter(o => !!o));
     };
 
     this.execute = Network.create(this.fetchFn, this.subscribeFn);