错误 Angular4 尝试 diff '[object Object]'

我正在尝试展示一些信息 dom, 但我收到这个错误：

错误：尝试时出错 diff '[object Object]'

我想做什么 - 它是通过这些数据
https://www.surbtc.com/api/v2/ ... icker
:

{"ticker":{"last_price": ["1771455.0","CLP"], "min_ask": ["1771432.0","CLP"], "max_bid": ["1660003.0","CLP"], "volume": ["178.37375119","BTC"], "price_variation_24h":"-0.107","price_variation_7d": "-0.115"}}

我想显示它 html, 像这样：

<div *ngfor="let price of prices">

 {{price.min_ask}}

 </div>

这是 service.ts:

import { Injectable } from '@angular/core';

import { Http, Headers, Response } from '@angular/http';

import 'rxjs/add/operator/toPromise';

import {Observable} from "rxjs";

import 'rxjs/Rx';

import 'rxjs/add/operator/catch';

import { SurbtcMarket } from './surbtcmarket'





@Injectable//

export class SurbtcService {



 constructor/private http: Http, private surBtcMarket : SurbtcMarket/ { }



 public getPricess// :Observable<surbtcmarket> {

 return this.http.get/'https://www.surbtc.com/api/v2/markets/btc-clp/ticker'/

 .map//response: Response/ =&gt; response.json///;

 }



}

界面 surbtcmarket.ts

export class SurbtcMarket {

public ticker: SurbtcMarketView[];

}



export class SurbtcMarketView {

 public last_price : number;

 public min_ask : number;

 public max_bid : number;

 public volume : number;

 public price_variation_24h : number;

 public price_variation_7d : number;

}

component.ts

import { Http, Response, Headers } from '@angular/http';

import { SurbtcService } from '../../surbtc/surbtc.service';

import {Observable} from "rxjs";



@Component/{

 selector: 'app-comprarltc',

 templateUrl: './comprarltc.component.html',

 styleUrls: ['./comprarltc.component.scss']

}/

export class ComprarltcComponent implements OnInit {



 private prices = [];



 constructor/private surbtcService: SurbtcService/ {

 this.surbtcService = surbtcService;

 }



ngOnInit//{

 this.surbtcService.getPricess//

 .subscribe/

 data => this.prices = data.ticker

 /;

}

}

</surbtcmarket>