提供的参数与呼叫目标的任何签名不匹配 - angular 2

问题描述：

我正在发出http get请求，但提供的参数与呼叫目标的任何签名都不匹配。我如何纠正这一点？提供的参数与呼叫目标的任何签名不匹配 - angular 2

getFood(id){ 
     let headers = new Headers({ 'Authorization': 'Bearer ' + this.auth.token }); 
     let options = new RequestOptions({ headers: headers }); 
     return this.http.get('http://localhost:8000/routes/food_serve/v1/foodlist/'+id+'/food', options) 
      .map((response:Response) => response.json()); 

    }

你有这些进口'进口{HTTP，RequestOptions ，Headers，Response} from'@ angular/http';导入'rxjs/add/operator/map';'？ – yurzui

@yurzui是的，我已经将它们导入 – XamarinDevil

究竟哪一条线会抛出错误？ – yurzui

答

，如果您使用的版本2 http.get返回可观察到的，所以也许这是个问题，你对功能没有返回类型

import { Response } from '@angular/http'; 
import { Observable } from 'rxjs/Rx'; 

getFood(id): Observable<Response> { 
    let headers = new Headers({ 'Authorization': 'Bearer ' + this.auth.token }); 
    let options = new RequestOptions({ headers: headers }); 
    return this.http.get('http://localhost:8000/routes/food_serve/v1/foodlist/'+id+'/food', options) 
     .map((response:Response) => response.json()); 

}

提供的参数与呼叫目标的任何签名不匹配 - angular 2

相关推荐