projekt kivitendo

                              kivi_datev_name => 'leistungsdatum',

                              csv_header_name => t8('Payment Date'),

                              max_length      => 8,

                              type            => 'Date',

                              default         => '',

                              input_check     => sub { my ($check) = @_; return  1 if ('' eq $check); return (ref (DateTime->from_kivitendo($check)) eq 'DateTime') },

                              formatter       => sub { my ($input) = @_; return '' if ('' eq $input); return DateTime->from_kivitendo($input)->strftime('%d%m%Y') },

                              valid_check     => sub { my ($check) = @_; return  1 if ('' eq $check); return ($check =~ m/^[0-9]{8}$/) },

                            },  # pos 115