From 15a8545085842e1c922ebbe4b50cb23fd02b4040 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jan=20B=C3=BCren?= <jan@kivitendo.de>
Date: Mon, 12 Nov 2018 11:01:16 +0100
Subject: [PATCH] =?utf8?q?DATEV::CSV=20undef=20ist=20kein=20g=C3=BCltiger?=
 =?utf8?q?=20Wert=20f=C3=BCr=20den=20DATEV-Export?=
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fixt den Fehler beim Testfall
---
 SL/DATEV/CSV.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SL/DATEV/CSV.pm b/SL/DATEV/CSV.pm
index a4585de26..1f31f169b 100644
--- a/SL/DATEV/CSV.pm
+++ b/SL/DATEV/CSV.pm
@@ -113,7 +113,7 @@ my @kivitendo_to_datev = (
                               type            => 'Text',
                               default         => '',
                               input_check     => sub { my ($check) = @_; return 1 unless $check; return (ref (DateTime->from_kivitendo($check)) eq 'DateTime') },
-                              formatter       => sub { my ($input) = @_; return undef unless $input; return trim(DateTime->from_kivitendo($input)->strftime('%e%m%y')) },
+                              formatter       => sub { my ($input) = @_; return '' unless $input; return trim(DateTime->from_kivitendo($input)->strftime('%e%m%y')) },
                               valid_check     => sub { my ($check) = @_; return 1 unless $check; return ($check =~ m/^[0-9]{5,6}$/) },
                             },
                             {
-- 
2.20.1