From 961a3f02f0d89c110473f957c94280f44bde5cc3 Mon Sep 17 00:00:00 2001
From: Mark Nelson <markn@moodle.com>
Date: Thu, 27 Dec 2018 09:05:45 +0800
Subject: [PATCH] Prevent exception when adding 'teachername' element to site
 template (#261)

---
 element/teachername/classes/element.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/element/teachername/classes/element.php b/element/teachername/classes/element.php
index c35d474..1c18e30 100644
--- a/element/teachername/classes/element.php
+++ b/element/teachername/classes/element.php
@@ -102,6 +102,11 @@ class element extends \mod_customcert\element {
     protected function get_list_of_teachers() {
         global $PAGE;
 
+        // Return early if we are in a site template.
+        if ($PAGE->context->id == \context_system::instance()->id) {
+            return [];
+        }
+
         // The list of teachers to return.
         $teachers = array();