% if ( scalar(@classnums) == 0 ) {
<& tr-fixed.html, %opt &>
% } elsif ( scalar(@classnums) == 1 ) {
%   $opt{'extra_sql'} .= ' AND '.$classnum_sql;
<& tr-select-table.html,
  'table'     => 'inventory_item',
  'name_col'  => 'item',
  'value_col' => 'item',
  %opt
&>
% } else {
<& tr-td-label.html, %opt &>
<TD>
<& select-tiered.html,
  'tiers' => [
    {
      field         => $opt{'field'}.'_classnum',
      table         => 'inventory_class',
      extra_sql     => "WHERE $classnum_sql",
      name_col      => 'classname',
      empty_label   => '(all)',
    },
    {
      field         => $opt{'field'},
      table         => 'inventory_item',
      name_col      => 'item',
      value_col     => 'item',
      link_col      => 'classnum',
      extra_sql     => delete($opt{'extra_sql'}),
      disable_empty => 1,
    },
  ],
  %opt,
  'prefix' => $opt{'prefix'}. $opt{'field'}. '_', #after %opt so it overrides
&>
</TD>
</TR>
% }
<%init>

my %opt = @_;

my @classnums;
if (ref($opt{'classnum'})) {
  @classnums = @{ $opt{'classnum'} };
} else {
  @classnums = split(',', $opt{'classnum'});
}
my $classnum_sql = 'classnum IN('.join(',', @classnums).')';

</%init>