Hyperledger fabric 我可以更改关系中定义的参数吗
1.我想知道是否可以更改关系中定义的参数 我想做的是创建一个名为bookflight的函数,然后在航班预订后更改座位数。 这些是我的cto文件Hyperledger fabric 我可以更改关系中定义的参数吗,hyperledger-fabric,hyperledger,hyperledger-composer,hyperledger-explorer,Hyperledger Fabric,Hyperledger,Hyperledger Composer,Hyperledger Explorer,1.我想知道是否可以更改关系中定义的参数 我想做的是创建一个名为bookflight的函数,然后在航班预订后更改座位数。 这些是我的cto文件 namespace org.acme.airline.aircraft /** Aircraft is an ACME Asset*/ asset Aircraft identified by aircraftId { o String aircraftId o Ownership ownershipType default
namespace org.acme.airline.aircraft
/** Aircraft is an ACME Asset*/
asset Aircraft identified by aircraftId {
o String aircraftId
o Ownership ownershipType default="LEASED"
// Number of seats per class
o Integer firstClassSeats range = [4,]
o Integer businessClassSeats range = [6, 20]
o Integer economyClassSeats range = [30, ]
o String nickName optional
}
enum Ownership {
o LEASED
o OWNED
}
航班代码是
namespace org.acme.airline.flight
import org.acme.airline.aircraft.Aircraft
asset Flight identified by flightId {
// Solution to the exercise - try out the Regular expression at http://regex101.com
// Share your optimized regular expression with others :)
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
}
concept Route {
o String origin regex=/[A-Z][A-Z][A-Z]/
o String destination regex=/[A-Z][A-Z][A-Z]/
o DateTime schedule
}
// Logistics department of ACME creates the flights
transaction CreateFlight {
o String flightNumber
o String origin
o String destination
o DateTime schedule
}
event FlightCreated {
o String flightId
}
// Assigns an aircraft to the flight
// The logistics / validation on availability of aircraft
// Kept outside of the Blockchain
transaction AssignAircraft {
o String flightId
o String aircraftId
}
// Event indicating that aircraft was assigned
event AircraftAssigned {
o String flightId
o String aircraftId
}
现在我想对飞行中的关系做些改变
要对其进行更改,我应该做什么。我已经制作了一个javascript文件.to
access在其中进行更改
function booktickets(registry){
//array to recored the hold the instances of aircraft resourse
const bnDef = bnUtil.connection.getBusinessNetwork();
const factory = bnDef.getFactory();
let flightResource = factory.newResource(aircraftNamespace,aircraftType,'AE201-05-05-2020');
flightResource.setPropertyValue('flightNumber','AE101');
flightResource.route = factory.newConcept(aircraftNamespace,'Route');
flightResource.route.setPropertyValue('origin', 'DEL');
flightResource.route.setPropertyValue('destination' , 'APH');
flightResource.route.setPropertyValue('schedule' , new Date('2018-10-15T21:44Z'));
flightResource.aircraft = factory.newRelationship('org.acme.airline.aircraft', 'Aircraft', 'CRAFT01');
//.setPropertyValue()
flightResource.aircraft.setPropertyValue('ownershipType','LEASED');
flightResource.aircraft.setPropertyValue('firstClassSeats',10);
flightResource.aircraft.setPropertyValue('businessClassSeats',10);
flightResource.aircraft.setPropertyValue('economyClassSeats',100);
return registry.update(flightResource).then(()=>{
console.log('Successfully created the flight!!!');
bnUtil.disconnect();
}).catch((error)=>{
console.log(error);
bnUtil.disconnect();
});
}
bookflight
函数提供模型,因此只能对其模型定义进行假设。至少(根据您的代码)需要:
transaction bookflight{}
const bnDef=bnUtil.connection.getBusinessNetwork()代码>
const factory=bnDef.getFactory()代码>
const factory=getFactory()代码>
有关事务函数、示例等的更多信息,请参见
注意:您可以指定如下值:
flightResource.route.origin='DEL';//不需要.setPropertyValue('origin','DEL');etc等
我看不到您更新飞机注册表的代码(使用flightResource.Aircraft
FYI)-但您需要该代码来更新相关资产中的字段(目前,您只更新上面的航班注册表)
new Date()
是非确定性代码-如果您希望从多个同行/组织中达成共识
你会注意到我之前发送的链接,显示了使用async/await
而不是JS承诺(.then etc)-更容易编码,更容易阅读。干杯