add_new_cvterm.pl

my $pub_cv =
    $schema->resultset('Cv::Cv')
           ->find_or_create({ name => 'publication' });

my $journal_cvterm = $pub_cv->find_related('cvterms',
					   { name => 'journal' }
					  );

$journal_cvterm ||= $schema->resultset('General::Db')
                           ->find_or_create( { name => 'null' } )
			   ->find_or_create_related('dbxrefs',
						    { name => 'null' },
						   )
			   ->create_related('cvterms',
					    { name => 'journal',
					      cv_id     => $pub_cv->cv_id,
					    }
					   );