如何包含 system.js 来修复以下错误？或者有没有其他解决方案？
我下载了relay-starter-kit（https://github.com/relayjs/relay-starter-kit），将database.js更改为database.ts，内容如下（片段1）。
我跑了“npm run update-schema”并得到了错误
System.register([], function (exports_1) {
^
ReferenceError: System is not defined
at Object.<anonymous> (database.js:9:1)
at Module._compile (module.js:410:26)
..
我知道它的发生是因为 update-schema 使用 scripts/updateSchema.js -> data/schema.js -> 从 data/database.js（database.ts 的编译版本）导入对象 -
System.register([], function(exports_1) {
片段1：
/// <reference path="./interface.d.ts" />
export class User implements IUser{
constructor (public id: String, public name: String){
this.id = id;
this.name = name;
}
}
// Model types
class UserModel extends User implements IUserModel {
constructor(public id: String, public name: String){
super (id,name);
}
getUser ():IUser{
return this;
}
setUser (_User:IUser) : void {
this.id = _User.id;
this.name = _User.name;
}
getUserbyId (_id:String):IUser{
if (_id === this.id){
return this;
} else {
return null;
}
}
}
export class Widget implements IWidget{
constructor (public id: String, public name: String){
this.id = id;
this.name = name;
}
}
// Model types
class WidgetModel extends Widget implements IWidgetModel {
constructor(public id: String, public name: String){
super (id,name);
}
getWidget ():IWidget{
return this;
}
setWidget (_Widget:IWidget) : void {
this.id = _Widget.id;
this.name = _Widget.name;
}
getWidgetbyId (_id:String):IWidget{
if (_id === this.id){
return this;
} else {
return null;
}
}
}
// Mock data
var viewer:IUserModel = new UserModel('1','Anonymous');
var widgets:IWidget[] = ['What\'s-it', 'Who\'s-it', 'How\'s-it'].map((name:String, i:any) => {
let widget:IWidgetModel = new WidgetModel(name,`${i}`);
return widget;
});
export function getUser (_id:String):IUser {
return viewer.getUserbyId(_id);
}
export function getViewer ():IUser {
return viewer.getUser();
}
export function getWidget (_id:String):any {
widgets.forEach(
w => {
if (w.id === _id)
return w;
else
return null;
}
);
}
export function getWidgets (): IWidget[]{
return widgets;
}