From e03ee8d840baa69724c414f0e821ec8f710f45b5 Mon Sep 17 00:00:00 2001
From: Eileen McNaughton <emcnaughton@wikimedia.org>
Date: Thu, 28 Sep 2023 10:37:04 +1300
Subject: [PATCH] Simplify check for additional participants

---
 CRM/Event/Form/Participant/Delete.php | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/CRM/Event/Form/Participant/Delete.php b/CRM/Event/Form/Participant/Delete.php
index 1ff6f7cce5..39c08340e3 100644
--- a/CRM/Event/Form/Participant/Delete.php
+++ b/CRM/Event/Form/Participant/Delete.php
@@ -16,8 +16,6 @@
  * @copyright CiviCRM LLC https://civicrm.org/licensing
  */
 
-use Civi\API\EntityLookupTrait;
-
 /**
  * Back office participant delete form.
  */
@@ -103,12 +101,10 @@ class CRM_Event_Form_Participant_Delete extends CRM_Contribute_Form_AbstractEdit
    * @throws \CRM_Core_Exception
    */
   public function buildQuickForm(): void {
-    $additionalParticipant = count(CRM_Event_BAO_Event::buildCustomProfile($this->getParticipantID(),
-        NULL,
-        $this->getParticipantValue('contact_id'),
-        FALSE,
-        TRUE
-      )) - 1;
+    $additionalParticipant = (int) CRM_Core_DAO::singleValueQuery(
+      'SELECT count(*) FROM civicrm_participant WHERE registered_by_id = %1 AND id <> registered_by_id',
+      [1 => [$this->getParticipantID(), 'Integer']]
+    );
     if ($additionalParticipant) {
       $deleteParticipants = [
         1 => ts('Delete this participant record along with associated participant record(s).'),
-- 
2.25.1