NAME

HTML::FormFu::Constraint::Callback - Code Callback Constraint

SYNOPSIS

    $field->constraint({
        type => 'Callback',
        callback => \&foo,
    );

    ---
    elements:
      - type: Text
        name: foo
        constraints:
          - type: Callback
            callback: "main::my_constraint"

    sub foo {
        my ( $value, $params ) = @_;

        # return true or false
    }

DESCRIPTION

The first argument passed to the callback is the submitted value for the associated field. The second argument passed to the callback is a hashref of name/value pairs for all input fields.

This constraint doesn't honour the not() value.

METHODS

callback

Arguments: \&code-reference

Arguments: "subroutine-name"

SEE ALSO

Is a sub-class of, and inherits methods from HTML::FormFu::Constraint

HTML::FormFu::FormFu

LIMITATIONS

The callback code-ref is copied internally using "dclone" in Storable. It seems that because of this, the coderef does not act as a true closure, and cannot refer to variables and subroutines that would otherwise be in scope. This need further investigation.

AUTHOR

Carl Franks cfranks@cpan.org

LICENSE

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