DATEV::CSV undef ist kein gültiger Wert für den DATEV-Export

[kivitendo-erp.git] / SL / DATEV / CSV.pm

diff --git a/SL/DATEV/CSV.pm b/SL/DATEV/CSV.pm
index a4585de..1f31f16 100644 (file)
--- 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}$/) },
                             },
                             {