NAME

CGI::Application::ValidateRM - Help validate CGI::Application run modes using Data::FormValidator

SYNOPSIS

 use CGI::Application::ValidateRM;

 my ($results,$err_page) = $self->check_rm('form_display','_form_profile');
  return $err_page if $err_page; 

DESCRIPTION

CGI::Application::ValidateRM helps to validate web forms when using the CGI::Application framework and the Data::FormValidator module.

check_rm

This CGI::Application method takes two inputs, as follows:

Return run mode

This run mode will be used to generate an error page, with the form re-filled and error messages in the form. This page will returned as a second output parameter.

The errors will be passed in as a hash reference, which can then be handed to a templating system for display.

The fields should be prepared using Data::FormValidator's built-in support for returning error messages as a hash reference. See the documentation for msgs in the Data::FormValidator::Results documentation.

Returning the errors with a prefix, such as "err_" is recommended. Using any_errors is also recommended to make it easy to display a general "we have some errors" message.

HTML::Template users may want to pass die_on_bad_params=>0 to the HTML::Template constructor to prevent the presence of the "err_" tokens from triggering an error when the errors are not being displayed.

Data::FormVaildator profile

This can either be provided as a hash reference, or as the name of a CGI::Application method that will return such a hash reference.

Additionally, the value of the 'dfv_defaults' param from the calling object is optionally used to pass deftauls to the new() constructor.

  $self->param('dfv_defaults')

By setting this to a hash reference of defaults in your cgiapp_init routine in your own super-class, you could make it easy to share some default settings for Data::FormValidator across several forms. Of course, you could also set parameter through an instance script.

validate_rm

Works like check_rm above, but returns the old style $valid hash reference instead of the results object.

EXAMPLE

In a CGI::Application module:

 # This is the run mode that will be validated. Notice that it accepts
 # some errors to be passed in, and on to the template system.
 sub form_display {
        my $self = shift;
        my $errs = shift;
 
        my $t = $self->load_tmpl('page.html');
 
        $t->param($errs) if $errs;
        return $t->output;
 }
 
 sub form_process {
        my $self = shift;
 
        use CGI::Application::ValidateRM;
        my ($results, $err_page) = $self->check_rm('form_display','_form_profile');
        return $err_page if $err_page; 

        #..  do something with DFV $results object now
 
        my $t = $self->load_tmpl('success.html');
        return $t->output;

 }
 
 sub _form_profile {
        return {
                required => 'email',
        };
 }

In page.html:

 <!-- tmpl_if err__ -->
        <h3>Some fields below are missing or invalid</h3>
 <!-- /tmpl_if -->
 <form>
        <input type="text" name="email"> <!-- tmpl_var err_email -->
 </form>

SEE ALSO

CGI::Application, Data::FormValidator, perl(1)

AUTHOR

Mark Stosberg <mark@stosberg.com>

LICENSE

Copyright (C) 2003 Mark Stosberg <mark@stosberg.com>

This module is free software; you can redistribute it and/or modify it under the terms of either:

a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version,

or

b) the "Artistic License"

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the Artistic License for more details.

For a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

cpanm CGI::Application::ValidateRM

perl -MCPAN -e shell
install CGI::Application::ValidateRM