NAME

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

SYNOPSIS

           $form->constraint({
               type => 'CallbackOnce',
               name => 'foo',
               callback => \&sfoo,
           );

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

               # return true or false
           }

DESCRIPTION

       Unlinke the HTML::FormFu::Constraint::Callback, this callback is only called once,
       regardless of how many values are submitted.

       The first argument passed to the callback is the submitted value for the associated field;
       this may be a single value or an arrayref of value.  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: \&sub_ref

SEE ALSO

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

       HTML::FormFu

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.