HTML::Template : Attempt to set nonexistent parameter 'top_sender'

**kvijayhari** · Dec 25, 2008, 22:18

hi,

I've been using the HTML:Template for the page design in Perl.

but the stuff works for some time and not working for some time..

I couldn't find the problem,

Look at my code,

Code:

#!d:/perl/bin/perl
use HTML::Template;
use CGI::Carp qw/fatalsToBrowser warningsToBrowser/;
my @top = (  {namee=>'raju',job=> '3434'},
		   {namee=>'ramesh',job=> '234'},
		   {namee=>'rajesh',job=> '123'},
	        );
my $template = HTML::Template->new(filename => 'index.tmpl');
$template->param(top_sender=>@top);
print "Content-Type: text/html\n\n", $template->output();

and the template file content is,

Code:

<center>
<body>
	<table align=center border=0 style="border:1px solid blue;" width=60&#37;>
	<th colspan=2>Top 10 Senders</th>
	<tr><td>Sender</td><td>Count</td></tr>	
	<tr>
       <tmpl_loop name="top_sender">
	<td>
	      Name: <tmpl_var name="namee"></td>
	      <td>Job:<tmpl_var name="job"></td>
	</tmpl_loop>
	</tr>
	</table></body></center>
</html>

this is not working and rendering the following error

HTML::Template : Attempt to set nonexistent parameter 'top_sender' - this parameter name doesn't match any declarations in the template file : (die_on_bad_params => 1) at e:\LOGANA~1\html\sample.pl line 20

But look at the following code it's working properly and i couldn't find much difference between the two.. s

Code:

#!d:/perl/bin/perl -T
use CGI::Carp qw/fatalsToBrowser warningsToBrowser/;
warningsToBrowser(1); # this should be put after printing the header;
use CGI qw(:all);
use HTML::Template;
use POSIX;
print header;
print "Content-type: text/html\n\n";
my $template = HTML::Template->new(filename => 'sample.tmpl');
$template->param(EMPLOYEE_INFO => [{ name => 'Sam', job => 'programmer' },
                                       { name => 'Steve', job => 'soda jerk dfds' },]
                   );
   print $template->output();

and the template file content is,

Code:

<body><center>
Today is <TMPL_LOOP NAME=EMPLOYEE_INFO>
      Name: <TMPL_VAR NAME=NAME> <br>
      Job:  <TMPL_VAR NAME=JOB>  <p>
   </TMPL_LOOP>

the above code is working nicely...

Something awkward..

Some time ago i tried to print the html content using print and the code rendered some error and when i added an empty line after last code it worked... seems the perl is something complicated than other programming languages..

**KevinR** · Dec 26, 2008, 08:42

Its been a while since I used that module, but I think the problem is you are not sending a reference to your array of hashes:

Code:

#!d:/perl/bin/perl
use HTML::Template;
use CGI::Carp qw/fatalsToBrowser warningsToBrowser/;
my @top = (  {namee=>'raju',job=> '3434'},
		   {namee=>'ramesh',job=> '234'},
		   {namee=>'rajesh',job=> '123'},
	        );
my $template = HTML::Template->new(filename => 'index.tmpl');
$template->param(top_sender=>@top);##<--- HERE IS THE PROBLEM
print "Content-Type: text/html\n\n", $template->output();

change the line to:

$template->param(top_sender=>\@top);

that will now send a reference to @top instead of the array @top. Hopefully thats all it is.

**kvijayhari** · Feb 9, 2009, 22:57

Can Anyone recommend me a perl module or technique to integrate HTML with Perl.

I'm using HTML::Template but it is causing some problems.

I want to know what is the latest technique used to integrate HTML with perl.

**KevinR** · Feb 10, 2009, 02:11

Look into Mason:

http://www.masonbook.com/

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