DESCRIPTION
FormBuilder is a fully-functional form engine with numerous features. It
is far more than a form-generating module. For example, you can build a
complete application with something as simple as this:
use CGI::FormBuilder;
# Let's assume we did a DBI query to get existing values
my $dbval = $sth->fetchrow_hashref;
my $form = CGI::FormBuilder->new(
method => 'POST',
fields => [qw/name email phone gender/],
values => $dbval,
validate => { email => 'EMAIL', phone => 'PHONE' },
required => 'ALL',
);
# Change gender field to have options
$form->field(name => 'gender', options => [qw/Male Female/]);
if ($form->submitted && $form->validate) {
my $fields = $form->field; # get form fields as hashref
# Do something to update your data (you would write this)
do_data_update($fields->{name}, $fields->{email},
$fields->{phone}, $fields->{gender});
print $form->confirm(header => 1); # confirmation screen
$form->mailconfirm(to => $fields->{email});
} else {
print $form->render(header => 1); # print out the form
}
That simple bit of code would print out an entire form, laid out in a
table, complete with JavaScript validation code. Default values would be
filled in from the DBI hashref. It would also handle stickiness across
multiple submissions correctly. It will also be able to tell if it's
been submitted, and do server-side validation too.
Overall, I just plain hate form generation and validation because the
majority of the process is tedious and mindless. FormBuilder tries to
get rid of the stoopid parts.
WHY USE FORMBUILDER?
There are a lot of form modules, scripts, etc out there. So why use this
one? Well, that's up to you, but here are the features that I feel are
the real benefits of FormBuilder:
DWIMmery
This module tries to "Do What I Mean". Tell it the fields you care
about, and it takes care of all the stupid HTML and JavaScript
generation and processing for you. It also gives you back the correct
values that you want. It will even label your fields automatically.
Input field abstraction
You simply define your fields and their values, and this module will
take care of figuring out what representation is best. It will then
generate the appropriate input fields (input, select, radio, etc), even
changing any JavaScript actions appropriately.
Easy handling of defaults
Just specify a hash of values to use as the defaults for your fields.
This will be searched case-insensitively and displayed in the form.
What's more, if the user enters something via the CGI that overrides a
default, when you use the "field()" method to get the data you'll get
the correct value.
Correct stickiness
Stickiness is a PITA. FormBuilder correctly handles even multiple values
selected in a multiple select list, integrated with proper handling of
defaults.
Robust field validation
Form validation sucks, and this is where FormBuilder is a big help. It
has tons of builtin patterns, and will even generate gobs of JavaScript
validation code for you. You can specify your own regexps as well, and
FormBuilder will correctly check even multivalued inputs.
Multiple submit mode support
FormBuilder allows you to reliably tell whether the person clicked on
the "Update" or "Delete" button of your form, normally a big pain.
Template driver support
FormBuilder can natively "drive" both major templating engines,
"HTML::Template" and "Template Toolkit". If you want to build a form
application with a template in less that 20 lines of Perl, FormBuilder
is for you.
INSTALLATION
Installation is standard, the same way as for other Perl modules.
SUPPORT
There is a website devoted to this module at www.formbuilder.org which
has tutorials, code examples, full documentation, and much more!
AUTHOR
Copyright (c) 2001-2003 Nathan Wiger, Sun Microsystems <
[email protected]>.
All Rights Reserved.
This module is free software; you may copy this under the terms of the
GNU General Public License, or the Artistic License, copies of which
should have accompanied your Perl kit.
