memnoch has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,

I have been staring at this for hours and I have no idea what I'm doing wrong. If anyone can help, I'll really appreciate it. The problem is with a CGI::Application run mode not being updated. Here's what happens.

The start_mode ('login_page') displays fine, and it calls the next run mode ('validate_login') through a submit button. The page displayed by 'validate_login' has a submit button in which I specify the next run mode ('user_results') with a hidden field. But in the generated HTML, instead of seeing:

<input type="hidden" name="run_mode" value="user_results"  />

[download]
I see:
<input type="hidden" name="run_mode" value="validate_login"  />

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That is, the hidden field still specifies the previous run mode (i.e. 'validate_login'), not what I want (i.e. 'user_results'). My reduced testcase is below: 
package Testcase;
use base 'CGI::Application';
use CGI::Application::Plugin::DBH qw(dbh_config dbh);
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
use strict;
use warnings 'all';

sub setup {
    my $self = shift;
    $self->run_modes(
        'login_page' => 'show_login_page',
        'validate_login' => 'validate_login',
        'user_results' => 'show_user_results_page',
        'logout' => 'show_logout_page',
    );
    $self->start_mode('login_page');
    $self->mode_param('run_mode');
}

sub show_login_page {
    my $self = shift;
    my $q = $self->query();
    my $title = 'Login Page';

    my $output = '';
    $output .= $q->start_html(-title => $title) . "<h2>$title</h2>\n";
    $output .= $q->start_form();
    $output .= "Email: " . $q->textfield(-name => 'entered_email', -si
+ze => 30, -maxlength => 50) . "<br>\n";
    $output .= "Password: " . $q->password_field(-name => 'entered_pas
+sword', -size => 20, -maxlength => 20) . "<br>\n";
    $output .= $q->submit('Login');
    $output .= $q->hidden(-name => 'run_mode', -value => 'validate_log
+in');
    $output .= $q->end_form;
    $output .= $q->end_html;
    return $output;
}

sub validate_login {
    my $self = shift;
    my $q = $self->query();
    my $title = "Welcome";

    my $output = '';
    $output .= $q->start_html(-title => $title) . "<h2>$title</h2>\n";
    $output .= $q->p(qq(Welcome!  To view your results, click the butt
+on below));
    $output .= $q->start_form();
    $output .= $q->submit('Results');
    $output .= $q->hidden(-name => 'run_mode', -value => 'user_results
+');
    $output .= $q->end_form;
    $output .= $q->end_html;
    return $output;
}

sub show_user_results_page {
    
}

sub show_logout_page {
    
}

1;

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And the HTML code displayed with the 'validate_login' run mode is: 
<!DOCTYPE html
    PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-U
+S">
<head>
<title>Welcome</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1
+" />
</head>
<body>
<h2>Welcome</h2>
<p>Welcome!  To view your results, click the button below</p><form met
+hod="post" action="/cgi-bin/testcase/testcase.cgi" enctype="multipart
+/form-data">
<input type="submit" name="Results" value="Results" /><input type="hid
+den" name="run_mode" value="validate_login"  /></form>
</body>
</html>

[download]
Any ideas where the problem is?

Replies are listed 'Best First'.
Re: CGI::Application run mode not being updated with hidden field
by ikegami (Patriarch) on Mar 15, 2008 at 01:34 UTC
    It has nothing to do with CGI::Application. Search for "-override" in the CGI docs.
[reply]
[d/l]

      Bless you! That was it! :)

[reply]
Re: CGI::Application run mode not being updated with hidden field
by stonecolddevin (Parson) on Mar 15, 2008 at 08:06 UTC
[reply]

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