角度json.data（）as array []

Question

私はjsonファイルからデータを抽出して配列に格納しようとしています。現在、私はこれらのエラーを取得しています：

zone.js:2933 GET http://localhost:4200/app/persons.json 404 (Not Found) 

と

core.es5.js:1020 ERROR Error: Uncaught (in promise): undefined 
    at resolvePromise (zone.js:824) 
    at resolvePromise (zone.js:795) 
    at zone.js:873 

これは私のサービスである：

import { Injectable } from '@angular/core'; 
import { Actor } from '../model/actor'; 
// import { ACTORS } from './mock-actors'; 
import { Http, Headers } from '@angular/http'; 
import 'rxjs/add/operator/toPromise'; 

@Injectable() 
export class ActorService { 
    private actorsUrl = '/app/persons.json'; 
    constructor(private http: Http) { } 
    getActors(): Promise<Actor[]> { 
     return this.http.get(this.actorsUrl) 
      .toPromise().then(response => response.json().data as Actor[]) 
      .catch(this.handleError); 
    } 
    private handleError(error: any): Promise<any> { 
     console.error('Error: ', error); 
     return Promise.reject(error.message); 
    } 
} 

私のモデル

export class Actor { 
    lastName: string; 
    profession: string; 
    bio: string; 
    url: string; 
    imageUri: string; 
    name: string; 
    id: number; 
    realName: string; 
} 

JSONファイルは次のようになりますこの

{"personList":[{"lastName":"Wolowitz","profession":"Aerospace Engineer","bio":"Howard Joel Wolowitz, M.Eng is a fictional character on the CBS television series The Big Bang Theory, portrayed by actor Simon Helberg. Among the main male characters in the show, Howard is distinguished for lacking a doctoral degree, for still living with his mother, and for believing himself to be a \"ladies' man\". Simon Helberg's character is named after a computer programmer known by the show's co-creator Bill Prady.","url":"https://en.wikipedia.org/wiki/Simon_Helberg","imageUri":"Howard_Wolowitz.jpg","name":"Howard","id":"howard","realName":"Simon Helberg"},{"lastName":"Hofstadter","profession":"Experimental physicist","bio":"Leonard Leakey Hofstadter, Ph.D., is a fictional character on the CBS television series The Big Bang Theory, portrayed by actor Johnny Galecki. Leonard is an experimental physicist originally from New Jersey who shares an apartment with colleague and friend Dr. Sheldon Cooper (Jim Parsons). Leonard and Sheldon are named after actor/producer Sheldon Leonard, and Nobel Prize Laureates Robert Hofstadter and Leon Cooper.\nLeonard has been described as the straight man of the series. Penny (Kaley Cuoco) is Leonard's next-door neighbor and main love interest, and the teasing of romance between the two of them is a major force driving the series. For his portrayal, Galecki was nominated for a Primetime Emmy Award and a Golden Globe Award.","url":"http://en.wikipedia.org/wiki/Johnny_Galecki","imageUri":"Leonard_Hofstadter.jpg","name":"Leonard","id":"KLJSMLND","realName":"Johnny Galecki"}} 

EDIT

私はこの

{ 
"/app/*":{ 
"target": "appfoundry-restdemo.herokuapp.com/";, "secure": false, "logLevel": "debug" 
    } 
} 

Answer 1

のようにプロキシを設定しているAPIへの接続を持っているために、このようにしてみてください。

応答メソッド内response.json（）。data insted of response.json（）。data as actor []

getActors(): Promise<Actor[]> { 
    return this.http.get(this.actorsUrl) 
     .toPromise().then(response => <Actor[]>response.json().data) 
     .catch(this.handleError); 
}