Re: [htmltmpl] print several vars in one loop

[Jason Purdy]

What I've done in the past, where I need to have more than two in a row 
is to create a nested loop, where the outer loop is the rows and the 
inner loop is the 3 (or N != 2) records you want to display.

Code Example (in the cgiapp):
# Need to divide into sixths for Rosie's design...
my $count = 0;
my $six_issues = [];
my $rows = [];
while( my $hr = $sth->fetchrow_hashref() ) {
  $hr->{'bi_rate'} = sprintf( "%.2f", $hr->{'bi_rate'} );
  $count++;
  my $img = 'graphics/TOC/' .
    sprintf( "%02d", $hr->{'volume_num'} ) .
    sprintf( "%02d", $hr->{'issue_num'} ) .
    '/cover-small.jpg';
  push @$six_issues, {
    'image_file'	=>	$img,
    'id'		=>	$hr->{'id'},
    'label'		=>	$hr->{'label'},
    'volume_num'	=>	$hr->{'volume_num'},
    'issue_num'		=>	$hr->{'issue_num'},
    'bi_rate'		=>	$hr->{'bi_rate'},
  };
  if ( $count % 6 == 0 ) {
    push @$rows, { 'six_issues' => $six_issues };
    $six_issues = [];
  }
}
push @$rows, { 'six_issues' => $six_issues } if ( $six_issues );
$template->param( 'rows' => $rows );
----------------------
htmltmpl Code Example:
----------------------
<!-- TMPL_LOOP NAME="rows" -->
<tr>
  <!-- TMPL_LOOP NAME="six_issues" -->
  <td valign="top" nowrap class="sansserif"><label for="ind_<!-- 
TMPL_VAR NAME="id" -->"><img src="<!-- TMPL_VAR NAME="image_file" -->" 
border="1" width="92" height="120"></label></td>
  <!-- /TMPL_LOOP -->
</tr>
<tr>
  <!-- TMPL_LOOP NAME="six_issues" -->
  <td valign="top" nowrap class="sansserif"><label for="ind_<!-- 
TMPL_VAR NAME="id" -->"><!-- TMPL_VAR NAME="label" --> <br>
  (Vol. <!-- TMPL_VAR NAME="volume_num" -->, Issue <!-- TMPL_VAR 
NAME="issue_num" -->)<br>
  <input type="checkbox" name="ind_issue" id="ind_<!-- TMPL_VAR 
NAME="id" -->" value="<!-- TMPL_VAR NAME="id" -->">
  $ <!-- TMPL_VAR NAME="bi_rate" --> (USD)</label>
  </td>
  <!-- /TMPL_LOOP -->
</tr>
<!-- /TMPL_LOOP -->

You can see this in action at our FB&C Subscription Website (it's the 
2nd process {we don't collect your information from the first step -- it 
all becomes hidden variables at the bottom of that 2nd page}):

http://www.finebooksmagazine.com/subscribe
This is one of the limitations of HTML::Template, but it's also a bleed 
or merge of logic/control into the presentation layer.  I (& you) might 
get tempted to move to something like TT, where you can put some logic 
in the template itself, but that's where you blur the lines of MVC.

I would be interested to read other responses to this, too.
Cheers,
Jason
PS: If you only wanted two, you could workaround it with the __EVEN__ 
and __ODD__ loop context variables.

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