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.\" ========================================================================
.\"
.IX Title "HTML::FormFu::Validator 3pm"
.TH HTML::FormFu::Validator 3pm "2014-05-05" "perl v5.18.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
HTML::FormFu::Validator \- Validator Base Class
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.SH "METHODS"
.IX Header "METHODS"
.SH "CORE VALIDATORS"
.IX Header "CORE VALIDATORS"
.SH "BEST PRACTICES"
.IX Header "BEST PRACTICES"
Try to avoid using callbacks if possible. Below is a more maintainable
and reusable approach, which also keeps the code out of the controller.
.PP
A normal application's directory would contain:
.PP
.Vb 4
\&    lib/HTML/FormFu/Constraint/MyApp/
\&    lib/HTML/FormFu/Validator/MyApp/
\&    lib/HTML/FormFu/Plugin/MyApp/
\&    etc.
.Ve
.PP
Then, the form config file would just need:
.PP
.Vb 1
\&    validator: \*(AqMyApp::SomeValidator\*(Aq
.Ve
.PP
And the class would be something like this:
.PP
.Vb 3
\&    package HTML::FormFu::Validator::MyApp::SomeValidator;
\&    use Moose;
\&    extends \*(AqHTML::FormFu::Validator\*(Aq;
\&
\&    sub validate_value {
\&        my ( $self, $value, $params ) = @_;
\&
\&        my $c = $self\->form\->stash\->{context};
\&
\&        return 1 if $c\->model(\*(AqDBIC\*(Aq)\->is_valid($value);
\&
\&        # assuming you want to return a custom error message
\&        # which perhaps includes something retrieved from the model
\&        # otherwise, just return 0
\&        die HTML::FormFu::Exception::Validator\->new({
\&            message => \*(Aqcustom error message\*(Aq,
\&        });
\&    }
\&
\&    1;
.Ve
.IP "HTML::FormFu::Validator::Callback" 4
.IX Item "HTML::FormFu::Validator::Callback"
.SH "AUTHOR"
.IX Header "AUTHOR"
Carl Franks, \f(CW\*(C`cfranks@cpan.org\*(C'\fR
.SH "LICENSE"
.IX Header "LICENSE"
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.