访问和更新资源的关系字段

Question

我正在通过以下方式从注册表中获取特定资产的资源：-

 var  flight = factory.newResource(Namespace,'Aircraft',flightId);

我通过以下方式为该资源分配关系：-

 flight.aircraft = factory.newRelationship('org.acme.airline.aircraft','Aircraft',aircraftId); 

flight.aircraft.firstClassSeats = 10;

flight.aircraft.secondClassSeats = 10;

此关系包含模型文件中定义的以下属性：

asset Aircraft identified by aircraftId {
  o String      aircraftId
  // Number of seats per class
  o Integer     firstClassSeats  default = 0  
  o Integer     businessClassSeats default = 0 
  o Integer     economyClassSeats    default = 0  
}

航班数据：

asset Flight identified by flightId {


      o   String            flightId regex=/[A-Z][A-Z][0-9][0-9][0-9]-[0-9][0-9]-[0-3][0-9]-[0-9][0-9]/
      o   String            flightNumber
      o   Route             route
      o   String[]          aliasFlightNumber  optional
      --> Aircraft          aircraft  optional
    }

现在，如何更新特定航班资源的这些关系值（例如firstClassSeats）并将其更新到相应的注册表。