From f22a4b980bff59a425c3bd30d0af4bed2b77ff2f Mon Sep 17 00:00:00 2001
From: Robbie Averill <robbie@silverstripe.com>
Date: Mon, 26 Nov 2018 16:01:46 +0100
Subject: [PATCH] FIX getComponentByType can return null - prevent null pointer
 errors

---
 src/Forms/GridField/GridFieldDetailForm_ItemRequest.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Forms/GridField/GridFieldDetailForm_ItemRequest.php b/src/Forms/GridField/GridFieldDetailForm_ItemRequest.php
index f83442288..a5724dcf6 100644
--- a/src/Forms/GridField/GridFieldDetailForm_ItemRequest.php
+++ b/src/Forms/GridField/GridFieldDetailForm_ItemRequest.php
@@ -284,9 +284,10 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler
         $previousAndNextGroup->addExtraClass('circular-group mr-2');
         $previousAndNextGroup->setFieldHolderTemplate(get_class($previousAndNextGroup) . '_holder_buttongroup');
 
+        /** @var GridFieldDetailForm $component */
         $component = $this->gridField->getConfig()->getComponentByType(GridFieldDetailForm::class);
         $gridState = $this->getRequest()->requestVar('gridState');
-        if ($component->getShowPagination()) {
+        if ($component && $component->getShowPagination()) {
             $previousAndNextGroup->push(FormAction::create('doPrevious')
                 ->setUseButtonTag(true)
                 ->setAttribute('data-grid-state', $gridState)
@@ -302,7 +303,7 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler
 
         $rightGroup->push($previousAndNextGroup);
 
-        if ($component->getShowAdd()) {
+        if ($component && $component->getShowAdd()) {
             $rightGroup->push(FormAction::create('doNew')
                 ->setUseButtonTag(true)
                 ->setAttribute('data-grid-state', $this->getRequest()->getVar('gridState'))