I am once again in need of Perl Monk wisdom. I am having a hard time wrapping my brain around database paging. I have found a few examples on the internet but they don't quite work for me.

With every example I have tried, the problem is always the same. I can output the database results and the correct number of page links depending on the results of the page. The problem is when I click on a page link, it goes to the next page but with no results and the page links disappear. Here is my code: 

if ($ENV{REQUEST_METHOD} eq "GET")
{
    &header();
    &display();
}
else
{
    &header();
    &display();
}

#########################
###   Print Header   ####
#########################
sub header {

    $cgi_object=new CGI;
    print $cgi_object->header('text/html');
}

#########################
###   Display Page    ###
#########################
sub display {

    
print qq~
<!DOCTYPE html>
<html>
<head>
<title>Search</title>
</head>

<body>
<form name="login" method="POST" action="/cgi-bin/search.cgi" />
<input type='submit' name='submit' id='submit' />
<h2>How Many Results Would You Like To See Per Page?</h2>

                <select name="per_page" id="per_page">
                <option value="25">25</option>
                <option value="50">50</option>
                <option value="75">75</option>
                <option vaule="100">100</option>
                </select>
<br /><br />~;

    my $query = new CGI;
    #$pagesize=$query->param('per_page');
    my $reqpage = $query->param('reqpage') || '1';    
    
    #Get total amount of rows from db
    $dbh=DBI->connect($connectionInfo,$user,$passwd);
    my $num_rows= $dbh->selectrow_array('select count(name) from video
+ order by name');
    my $num_results = $query->param('per_page');
    
    # calculate the number of pages to show
    my $pagecount = int($num_rows / $num_results);
    if (($pagecount * $num_results) != $num_rows)
    {
        $pagecount++;
    }
    
    # calculate which results to show in the page
    my $firstresult = (($reqpage - 1) * $num_results) + 1;
    my $lastresult = $firstresult + $num_results - 1;
    if ($lastresult > $num_rows)
    {
        $lastresult = $num_rows;
    }
    
    # sql limit starts at 0
    my $start_point = $firstresult - 1;
    
    my $sth = $dbh->prepare("Select name,path from video order by name
+ LIMIT $start_point,$num_results"); 
    $sth->execute();
    while (@row = $sth->fetchrow_array())
    {
        my $name = $row[0];
        my $path = $row[1];
    
        $path =~ s/'/%27/g;
        $dsp = substr $path, 27, 255;
        print "<a href='/media/$dsp'>$name</a> <br />";
        
        $count=$count+1;
    }
    $sth->finish();
    
    # page links
    my ($prev_link, $next_link, $pagelinks, $pageno, $thislink, $pages
+ize);
    my $prev_page = $reqpage - 1;
    my $next_page = $reqpage + 1;
 
    if ($reqpage == 1)
    {
        $prev_link = "";
    }
    else
    {
        $prev_link = " <a href=\"http://Server_IP/cgi-bin/search.cgi/p
+age$prev_page\">". "previous" . "</a>";
    }
    if ($reqpage == $pagecount)
    {
        $next_link = "";
    }
    else
    {
        $next_link = " <a href=\"http://Server_IP/cgi-bin/search.cgi/p
+age$next_page\">". "next" . "</a>";
    } 

    if ($pagecount > 1)
    {
        $pagelinks = $prev_link;
        $pageno = 0;
        while ($pageno < $pagecount)
        {
            $pageno++;
            if ($pageno == $reqpage)
            {
                $thislink = " <strong>$pageno</strong> ";
            }
            else
            {
                $thislink = " <a href=\"http://Server_IP/cgi-bin/searc
+h.cgi/page$pageno\">" . $pageno . "</a>";
            }
            $pagelinks = $pagelinks . $thislink;
        }
        $pagelinks = $pagelinks . "   " . $next_link;
    }
    else
    {
        $pagelinks = "";
    }

print "<br />";    
print $count; print "<br /><br />";
print $pagelinks . "<br />"; 
print qq~
<br />
<br />
</body>
</html>~;
}

[download]

Any ideas on where I'm going wrong?
Thanks in advance.

In reply to Perl Database Paging by ironside

Title:
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