I'm wondering (1) how to resolve "Global symbol "$result" requires explicit package name" and (2) how to get my log messages to the log.

gistfile1.txt

I'm getting 500 responses to this:
http://localhost:9000/v1/book/006-0-51218-7/

My restart script sets --

export MOJO_LOG_LEVEL=debug
export MOJO_MODE=dev

logs report -- 

[Sun May  4 19:53:08 2014] [error] Global symbol "$result" requires explicit package name at template books/isbn_exists.html.ep line 4.
1: % layout 'default';
2: % title 'Book exists?';
3: <h2><%= $isbn %></h2>
4: <p><%= $result %></p>

[Sun May  4 19:53:08 2014] [debug] Template "exception.dev.html.ep" not found.
[Sun May  4 19:53:08 2014] [debug] Template "exception.html.ep" not found.
[Sun May  4 19:53:08 2014] [debug] Rendering inline template "07b75e59cb799a91ec864231fe5902c8".
[Sun May  4 19:53:08 2014] [debug] 500 Internal Server Error (0.177316s, 5.640/s).

relevant method -- 

sub isbn_exists {
  my $self = shift;
  my $isbn = $self->stash('isbn');
  $isbn =~ s/\D//;
  my $isbn_obj = Business::ISBN->new( $isbn );
  return $self->render unless $isbn_obj->is_valid;
  my $isbn_as_text = $isbn_obj->as_isbn13->{'common_data'};
  $self->app->log->debug( 'ISBN, ready for database search is: ' . Dumper $isbn_as_text );
  my $title = $self->get_book_title( $isbn_as_text );
  my $result;
  if( defined( $title ) ){
    $result = "Book Exists, ISBN# $isbn_as_text, Title: $title";
  } else {
    $result = "No book with ISBN#: $isbn_as_text exists in database.";
  }
  $self->stash( result => $result );
  $self->render();
}