NAME

FormValidator::Lite - lightweight form validation library

SYNOPSIS

use FormValidator::Lite;

FormValidator::Lite->load_constraints(qw/Japanese/);

my $q = CGI->new();
my $validator = FormValidator::Lite->new($q);
my $res = $validator->check(
    name => [qw/NOT_NULL/],
    name_kana => [qw/NOT_NULL KATAKANA/],
    {mails => [qw/mail1 mail2/]} => ['DUPLICATION'],
);
if ( ..... return_true_when_if_error() ..... ) {
    $validator->set_error('login_id' => 'DUPLICATION');
}
if ($validator->has_error) {
    ...
}

# in your tmpl
<ul>
? for my $msg ($validator->get_error_messages) {
    <li><?= $msg ?></li>
? }
</ul>

DESCRIPTION

FormValidator::Lite is simple, fast implementation for form validation.

IT'S IN BETA QUALITY. API MAY CHANGE IN FUTURE.

HOW TO WRITE YOUR OWN CONSTRAINTS

http parameter comes from $_
validator args comes from @_

METHODS

my $validator = FormValidator::Lite->new($q);

Create a new instance.

$q is query like object, such as Apache::Request, CGI.pm, Plack::Request. The object MUST have a $q->param method.

$validator->query()

$validator->query($query)

Getter/Setter for query like object.

$validator->check(@rule_ary)

my $res = $validator->check(
    name      => [qw/NOT_NULL/],
    name_kana => [qw/NOT_NULL KATAKANA/],
    {mails => [qw/mail1 mail2/]} => ['DUPLICATION'],
);

This method do validation. You can write a rule in @rule_ary. In above example code, name is a parameter name, NOT_NULL, KATAKANA and DUPLICATION are name of constraints.

$validator->is_error($key)

Return true value if parameter named $key got error.

$validator->is_valid()

Return true value if $validator don't detects error.

This is same as !$validator->has_error().

$validator->has_error()

Return true value if $validator detects error.

This is same as !$validator->is_valid().

$validator->set_error($param, $rule_name)

Set new error to parameter named <$param>. The rule name is <$rule_name>.

$validator->errors()

Return whole errors as HashRef.

{
    'foo' => { 'NOT_NULL' => 1, 'INT' => 1 },
    'bar' => { 'EMAIL' => 1, },
}

$validator->load_constraints($name)

$validator->load_constraints("DATE", "Email");

# or load your own constraints
$validator->load_constraints("+MyApp::FormValidator::Lite::Constraint");

There is a import style.

use FormValidator::Lite qw/Date Email/;

load constraint components named "FormValidator::Lite::Constraint::${name}".

$validator->load_function_message($lang)

$validator->load_function_message('ja');

Load function message file.

Currently, FormValidator::Lite::Messages::ja and FormValidator::Lite::Messages::en are available.

$validator->set_param_message($param => $message, ...)

$validator->set_param_message(
    name => 'Your Name',
);

Make relational map for the parameter name to human readable name.

$validator->set_message_data({ message => $msg, param => $param, function => $function })

$v->set_message_data(YAML::Load(<<'...'));
---
message:
  zip.jzip: Please input correct zip number.
param:
  name: Your Name
function:
  not_null: "[_1] is empty"
  hiragana: "[_1] is not Hiragana"
...

Setup error message map.

$validator->set_message("$param.$func" => $message)

$v->set_message('zip.jzip' => 'Please input correct zip number.');

Set error message for the $param and $func.

my @errors = $validator->get_error_messages()

my $errors = $validator->get_error_messages()

Get whole error messages for <$q> in array/arrayref. This method returns array in list context, otherwise HashRef.

my $msg = $validator->get_error_message($param => $func)

Generate error message for parameter $param and function named $func.

my @msgs = $validator->get_error_messages_from_param($param)

Get error messages by $q for parameter $param.

WHY NOT FormValidator::Simple?

Yes, I know. This module is very similar with FV::S.

But, FormValidator::Simple is too heavy for me. FormValidator::Lite is fast!

Perl: 5.010000
FVS: 0.23
FVL: 0.02
                        Rate FormValidator::Simple   FormValidator::Lite
FormValidator::Simple  353/s                    --                  -75%
FormValidator::Lite   1429/s                  304%                    --

AUTHOR

Tokuhiro Matsuno <tokuhirom AAJKLFJEF@ gmail.com>

THANKS TO

craftworks

nekokak

tomi-ru

SEE ALSO

FormValidator::Simple, Data::FormValidator, HTML::FormFu

LICENSE

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.