From 7593e6378a0f11108bf9b121e6ad58148652d98c Mon Sep 17 00:00:00 2001
From: poulch <chyla1988@gmail.com>
Date: Wed, 25 Jan 2023 08:34:01 +0100
Subject: [PATCH] Fix crash staff page when access property of undefined
 (#3038)

---
 src/staff/utils.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/staff/utils.ts b/src/staff/utils.ts
index 3a635af8b..70b65362e 100644
--- a/src/staff/utils.ts
+++ b/src/staff/utils.ts
@@ -7,9 +7,13 @@ import { StaffDetailsFormData } from "./components/StaffDetailsPage";
  * Return lists of groups which have to be added and removed from user.
  */
 export const groupsDiff = (
-  user: StaffMemberDetailsFragment,
+  user: StaffMemberDetailsFragment | undefined,
   formData: StaffDetailsFormData,
 ) => {
+  if (!user) {
+    return {};
+  }
+
   const newGroups = formData.permissionGroups;
   const oldGroups = user.permissionGroups.map(u => u.id);