From 5249ac55c556a1dfdd32e845ee0d1fcf75fa412a Mon Sep 17 00:00:00 2001
From: Phillip Zada <phillip@zware.com.au>
Date: Wed, 20 Sep 2017 09:20:55 +1000
Subject: [PATCH] #405 selectId as optional

---
 modules/entity/src/create_adapter.ts | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/modules/entity/src/create_adapter.ts b/modules/entity/src/create_adapter.ts
index ebb2304d7c..c51f85295f 100644
--- a/modules/entity/src/create_adapter.ts
+++ b/modules/entity/src/create_adapter.ts
@@ -10,14 +10,15 @@ import { createSelectorsFactory } from './state_selectors';
 import { createSortedStateAdapter } from './sorted_state_adapter';
 import { createUnsortedStateAdapter } from './unsorted_state_adapter';
 
-export function createEntityAdapter<T>(options?: {
-  selectId: IdSelector<T>;
-  sortComparer?: false | Comparer<T>;
-}): EntityAdapter<T> {
-  options = options || { selectId: (instance: any) => instance.id };
-
+export function createEntityAdapter<T>(
+  options: {
+    selectId?: IdSelector<T>;
+    sortComparer?: false | Comparer<T>;
+  } = {}
+): EntityAdapter<T> {
   const { selectId, sortComparer }: EntityDefinition<T> = {
     sortComparer: false,
+    selectId: (instance: any) => instance.id,
     ...options,
   };