From 68933abfde509c786f2edbd84cb7303d1cbd2bb0 Mon Sep 17 00:00:00 2001
From: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date: Sat, 29 Apr 2017 00:32:03 +0100
Subject: [PATCH] CONTRIB-6873 teacher view: adjust paging

Prevent the paging offset from being beyond the list's end
---
 teacherview.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/teacherview.php b/teacherview.php
index 7b248505..b7f056b1 100644
--- a/teacherview.php
+++ b/teacherview.php
@@ -438,6 +438,9 @@ function scheduler_print_schedulebox(scheduler_instance $scheduler, $studentid,
         $offset = 0;
     }
 }
+if ($offset * $pagesize >= $sqlcount && $sqlcount > 0) {
+    $offset = floor(($sqlcount-1) / $pagesize);
+}
 
 $slots = $scheduler->get_slots_for_teacher($teacherid, $currentgroup, $offset * $pagesize, $pagesize);