From 6779695ba052d61fb8c3fd9e3bfebf6606d1f18b Mon Sep 17 00:00:00 2001
From: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Date: Mon, 5 Aug 2019 10:54:57 -0500
Subject: [PATCH] Bug 22142: Do not revert data if 'unchanged' was set

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit cec6f46b47ae9625222f35014f6693ba7bb365e8)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 3c410ab3a3b0e1dbcae3e155a63333f1e630017f)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
---
 C4/CourseReserves.pm                        | 1 +
 t/db_dependent/CourseReserves/CourseItems.t | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/C4/CourseReserves.pm b/C4/CourseReserves.pm
index 5156c8fb98..32c9730f55 100644
--- a/C4/CourseReserves.pm
+++ b/C4/CourseReserves.pm
@@ -590,6 +590,7 @@ sub _RevertFields {
 
     my $mod_item_params;
     foreach my $field ( @FIELDS ) {
+        next unless defined $course_item->{$field};
         $mod_item_params->{$field} = $course_item->{$field};
     }
 
diff --git a/t/db_dependent/CourseReserves/CourseItems.t b/t/db_dependent/CourseReserves/CourseItems.t
index 38ceaa39e3..c5ce9652ff 100644
--- a/t/db_dependent/CourseReserves/CourseItems.t
+++ b/t/db_dependent/CourseReserves/CourseItems.t
@@ -23,7 +23,7 @@ use C4::CourseReserves qw/ModCourseItem ModCourseReserve DelCourseReserve GetCou
 use C4::Context;
 use Koha::Items;
 
-use Test::More tests => 28;
+use Test::More tests => 29;
 
 BEGIN {
     require_ok('C4::CourseReserves');
-- 
2.39.5