+my @additional_fields = Koha::AdditionalFields->search( { tablename => 'aqbasket', searchable => 1 } );
+$template->param( available_additional_fields => \@additional_fields );
+my @additional_field_filters;
+foreach my $additional_field (@additional_fields) {
+ my $value = $input->param('additional_field_' . $additional_field->id);
+ if (defined $value and $value ne '') {
+ push @additional_field_filters, {
+ id => $additional_field->id,
+ value => $value,
+ };
+ }
+}
+$filters->{additional_fields} = \@additional_field_filters;
+