return shift->customer_id ? 'sales_delivery_order' : 'purchase_delivery_order';
}
+sub displayable_type {
+ my $type = shift->type;
+
+ return $::locale->text('Sales Delivery Order') if $type eq 'sales_delivery_order';
+ return $::locale->text('Purchase Delivery Order') if $type eq 'purchase_delivery_order';
+
+ die 'invalid type';
+}
+
+
sub displayable_state {
my ($self) = @_;