NAME FormValidator::Simple::Plugin::CustomConstraint - Custom constraint support for FormValidator::Simple SYNOPSIS use FormValidator::Simple qw/CustomConstraint/; my $input_params = { username => 'someone' }; #limit search to 10 records for example my $arg_limit = 'LIMIT 10'; #run the check my $result = FormValidator::Simple->check( $input_params => [ username => [ 'NOT_BLANK', [ 'CUSTOM_CONSTRAINT', \&validate_username, $arg_limit ] ] ] ); #define our custom validation rule sub validate_username { my ( $constraint_value, $other_args ) = @_; #check the database to see if username exists for example and use passed in argument ... $exists = $dbh->selectrow_arrayref( $sql, {}, $other_args->[0] )->[0]; return $exists ? 1 : 0; } DESCRIPTION This module provides a plugin for FormValidator::Simple that allows for custom constraint definitions or custom validation rules to be specified. EXPORT None by default. SEE ALSO Catalyst::Plugin::FormValidator::Simple, FormValidator::Simple AUTHOR Alex Pavlovic, COPYRIGHT AND LICENSE Copyright (C) 2012 by Alex Pavlovic ( alex.pavlovic@taskforce-1.com ) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.12.4 or, at your option, any later version of Perl 5 you may have available.