+ delivery_customer => {
+ class => 'SL::DB::Customer',
+ key_columns => { delivery_customer_id => 'id' },
+ },
+
+ delivery_vendor => {
+ class => 'SL::DB::Vendor',
+ key_columns => { delivery_vendor_id => 'id' },
+ },
+
+ department => {
+ class => 'SL::DB::Department',
+ key_columns => { department_id => 'id' },
+ },
+