my $db= $c->model('DB');
my $rs= $db->resultset('OtherThing');

##</code><code>##

sub otherthing {
  my $self= shift;
  my $rs= $self->model('DB')->resultset('OtherThing');
  return @_? $rs->find(shift) : $rs
}

##</code><code>##

$c->otherthing($id); # fetch an OtherThing row by primary key
$c->otherthing->search_rs(...)->all  # convenient access to resultset