$c->stash->{payments} = [
    map {
        {   is_due => $this->is_due( $c, $_ ),
            cancel_url => $c->uri_for_action( '/payment/cancel', [ $_->id ] ),
            detail_url => $c->uri_for_action( '/payment/view',   [ $_->id ] ),
            payment_method =>
                $this->payment_method_descr_for( $c, $_->payment_method_id ),

            # how about the original object ?
            payment => $_,

            # or
            payment_id       => $_->id,
            payment_quantity => $_->quantity,

            # ....
        }
        } @payments
];