我在下面的plunker中收到以下错误.
Cannot set property stack of [object Object] which has only a getter
Plunker在这里
https://plnkr.co/edit/IP1ssat2Gpu1Cra495u2?p=preview
代码如下:
//our root app component import {Component,NgModule,OnInit,Injectable} from '@angular/core' import {BrowserModule} from '@angular/platform-browser' import { HttpModule,Http } from '@angular/http'; import 'rxjs/add/operator/toPromise'; class MyModel { public name: string; public value: string; } @Injectable() export class MyService { constructor(public http: Http) { } getData (request: MyModel):Promise<MyModel>{ return this.http.get('https://run.plnkr.co/j2Cw0yaD5Dn7ENaR/mymodel.json') .toPromise() .then(response => { return response as MyModel; }); } } @Component({ selector: 'my-app',template: ` <div> <h2>Hello {{name}}</h2> </div> `,}) export class App implements AfterViewInit { name:string; constructor(myService : MyService) { this.name = 'Angular2' } ngAfterViewInit(){ let myModelObj : MyModel = new MyModel(); console.log(this.myService); this.myService.getData(myModelObj) .then(response => { console.log('GET Request success') console.log(response); }); } } @NgModule({ imports: [ BrowserModule,HttpModule ],declarations: [ App ],providers : [MyService],bootstrap: [ App ] }) export class AppModule {}
更新
我能够理解这里的错误
this.myService.getData(myModelObj) .then(response => { console.log('GET Request success') console.log(response); });
如果我评论这4行,那么它工作正常.请帮忙.