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HTML::FormFu::Constraint::Callback.3pm

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

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.