From 70d870dc7d586b96b8b5a64730296f2c36d93219 Mon Sep 17 00:00:00 2001
From: Brian Shaughnessy <brian@lcdservices.biz>
Date: Mon, 22 Apr 2019 21:43:19 -0400
Subject: [PATCH] dev/core#891 condition on id existenced when retrieving
 mailing hash

---
 CRM/Mailing/BAO/Mailing.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CRM/Mailing/BAO/Mailing.php b/CRM/Mailing/BAO/Mailing.php
index 7e7d8ef8dd5d..f0ced3b8d881 100644
--- a/CRM/Mailing/BAO/Mailing.php
+++ b/CRM/Mailing/BAO/Mailing.php
@@ -1775,7 +1775,7 @@ public static function replaceGroups($mailingId, $type, $entity, $entityIds) {
    */
   public static function getMailingHash($id) {
     $hash = NULL;
-    if (Civi::settings()->get('hash_mailing_url')) {
+    if (Civi::settings()->get('hash_mailing_url') && !empty($id)) {
       $hash = CRM_Core_DAO::getFieldValue('CRM_Mailing_BAO_Mailing', $id, 'hash', 'id');
     }
     return $hash;