Q: I need to trim leading and trailing spaces from the `email` field.
   (e.g. " email@domain.com  " ==> "email@domain.com"  


sub validate_form {
    my $q = shift;
    
    my $profile = {
                   'required' => [qw(email)],
                   'constraints'=> {
                                    'email'      => 'email'
                                   }
                  };
    
    my $results = Data::FormValidator->check($q,$profile);
    return $results;
}

Hello russianspy-ga,

Thank-you for your question.

Data::FormValidator has a filter that can allow you to trim the
leading/trailing characters.

"filters

 # trim leading and trailing whitespace on all fields
 filters       => ['trim'],

This is a reference to an array of filters that will be applied to ALL
optional and required fields.

This can be the name of a built-in filter (trim,digit,etc) or an
anonymous subroutine which should take one parameter, the field value
and return the (possibly) modified value.

Filters modify the data, so use them carefully.

See Data::FormValidator::Filters for details on the built-in filters."
http://search.cpan.org/~markstos/Data-FormValidator-4.00_02/lib/Data/FormValidator.pm#filters

The detail page for Data::FormValidator::Filters can be found here:
http://search.cpan.org/~markstos/Data-FormValidator-4.14/lib/Data/FormValidator/Filters.pm

I don't have my system set-up to fully verify this but it should make
your subroutine something like this:

sub validate_form {
    my $q = shift;
    
    my $profile = {
                   'required' => [qw(email)],
                   'constraints'=> {
                                    'email'      => 'email'
                                   },
                   'filters'       => [ 'trim' ] 
                  };
    
    my $results = Data::FormValidator->check($q,$profile);
    return $results;
}

If you need any further assistance please post as much information as
possible (including any webpages and code you have already) and ask
for clarification.  I will do my best to respond swiftly.

The code snipped was handy. Thanks!