Re: [cgiapp] RFC: Data::FormValidator 4.0

[Jason Purdy <suppressed>]

What I find amazing is the whole closure thing.  That was one of the 
things that was hanging me up - when writing customized constraint 
methods, it would have been nice to have access to some of the 
application data (database handles, mostly, if I recall correctly).

Thinking back -- let's say I wanted to constrain the email address by 
checking the database to see if it already exists or not:

sub _my_profile
{
  return
  {
    'constraints' =>
    {
      'email' => \&_check_email,
    },
  };
}

sub _check_email
{
  my ( $email );
  $email = shift;
  # now here's my problem ... now I have to create a db handle
  # when one already exists ... if I only had access to the cgiapp
  # $self instance.
}

- Jason

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