From a6bf4b6dafe2b23a48ca076e40f45bdb5f65a853 Mon Sep 17 00:00:00 2001
From: Didier Gautheron <didier.gautheron@biblibre.com>
Date: Tue, 26 May 2020 13:31:31 +0200
Subject: [PATCH] Bug 25605: Replace NULL values with '' when downloading a
 report as a tab separated text

Test plan :
    1- Create a new report : select * from items;
    2- Run it
    3- Download the report as a tab separated text
    4- There's a lot of 'use of uninitialized value in join or string at ...koha/reports/guided_reports.pl line xxx.'
    in plack-error.log
    5- Apply patch
    6- Restart all
    7- Redo 2 and 3
    8- No more warning.
    9- diff both downloaded files, they must be the same.
---
 reports/guided_reports.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reports/guided_reports.pl b/reports/guided_reports.pl
index fa2817f1c7..990832b14d 100755
--- a/reports/guided_reports.pl
+++ b/reports/guided_reports.pl
@@ -901,7 +901,7 @@ elsif ($phase eq 'Export'){
             $content .= join("\t", header_cell_values($sth)) . "\n";
             $content = Encode::decode('UTF-8', $content);
             while (my $row = $sth->fetchrow_arrayref()) {
-                $content .= join("\t", @$row) . "\n";
+                $content .= join("\t", map { $_ // '' } @$row) . "\n";
             }
         } else {
             my $delimiter = C4::Context->preference('delimiter') || ',';
-- 
2.11.0