---
name: "Validation::Class::Directive::Validation"
section: "3pm"
platform: "linux"
package: "libvalidation-class-perl"
version: "7.900059-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Validation::Class::Directive::Validation"
---

# Validation::Class::Directive::Validation(3pm)

Validation Directive for Validation Class Field Definitions

## NAME

Validation::Class::Directive::Validation - Validation Directive for Validation Class Field Definitions

## VERSION

version 7.900059

## SYNOPSIS

```
    use Validation::Class::Simple;
    my $rules = Validation::Class::Simple->new(
        fields => {
            example_data => {
                validation => sub {
                    my ($self, $proto, $field, $params) = @_;
                    # user-defined validation should return true/false
                }
            }
        }
    );
    # set parameters to be validated
    $rules->params->add($parameters);
    # validate
    unless ($rules->validate) {
        # handle the failures
    }
```

## DESCRIPTION

Validation::Class::Directive::Validation is a core validation class field directive that is used to execute user-defined validation routines. This directive always takes a sub-routine and should return true or false.

## AUTHOR

Al Newkirk \<anewkirk@ana.io\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Al Newkirk.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.