From e50a47f9e430c9ef22938abd69e81d6d3f9bf3f9 Mon Sep 17 00:00:00 2001
From: ppound <paul.pound@gmail.com>
Date: Mon, 29 Nov 2021 10:41:48 -0400
Subject: [PATCH] fixed bug when deleting an entity that has associated
 reservations

---
 src/Controller/CalendarController.php | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Controller/CalendarController.php b/src/Controller/CalendarController.php
index 8570f11..5db5e14 100644
--- a/src/Controller/CalendarController.php
+++ b/src/Controller/CalendarController.php
@@ -234,9 +234,13 @@ class CalendarController extends ControllerBase {
       // add in pre/post buffer for setup/takedown (rev 7.x-1.3+)
       //  - if the slot is part of buffer we add "setup" to class
       //  - if we don't have admin rights; we also mark it as booked so no one can book in these slots
-      $category = $categories[$entities[$rid]->$category_field->getString()];
-      $preslots = $category['prebuffer'] / 30;
-      $postslots = $category['postbuffer'] / 30;
+      $preslots = 0;
+      $postslots = 0;
+      if(isset($entities[$rid])) {
+        $category = $categories[$entities[$rid]->$category_field->getString()];
+        $preslots = $category['prebuffer'] / 30;
+        $postslots = $category['postbuffer'] / 30;
+      } 
       $startkey = array_search($reservations[$rid][$time]['time'], $times);
       $endkey = $startkey + $time_slots;
       $k = $startkey - $preslots;