DATEV-CSV-Export leere Feldwerte für Belegfeld2 erlauben

diff --git a/SL/DATEV/CSV.pm b/SL/DATEV/CSV.pm
index 908347a..a4585de 100644 (file)
--- a/SL/DATEV/CSV.pm
+++ b/SL/DATEV/CSV.pm
@@ -113,8 +113,8 @@ 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 ($input) = @_; return trim(DateTime->from_kivitendo($input)->strftime('%e%m%y')) },
-                              valid_check     => sub { my ($check) = @_; return ($check =~ m/^[0-9]{5,6}$/) },
+                              formatter       => sub { my ($input) = @_; return undef 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}$/) },
                             },
                             {
                               kivi_datev_name => 'not yet implemented',