+sub used {
+ my ($self) = @_;
+
+ return unless $self->cp_id;
+
+ require SL::DB::Order;
+ require SL::DB::Invoice;
+ require SL::DB::PurchaseInvoice;
+ require SL::DB::DeliveryOrder;
+
+ return SL::DB::Manager::Order->get_all_count(query => [ cp_id => $self->cp_id ])
+ + SL::DB::Manager::Invoice->get_all_count(query => [ cp_id => $self->cp_id ])
+ + SL::DB::Manager::PurchaseInvoice->get_all_count(query => [ cp_id => $self->cp_id ])
+ + SL::DB::Manager::DeliveryOrder->get_all_count(query => [ cp_id => $self->cp_id ]);
+}
+
+sub detach {
+ $_[0]->cp_cv_id(undef);
+ $_[0];
+}
+
+sub full_name {
+ my ($self) = @_;
+ die 'not an accessor' if @_ > 1;
+ join ', ', grep $_, $self->cp_name, $self->cp_givenname;
+}
+
+sub full_name_dep {
+ my ($self) = @_;
+ die 'not an accessor' if @_ > 1;
+ $self->full_name
+ . join '', map { " ($_)" } grep $_, $self->cp_abteilung;
+}
+