Question

转换响应（例如json数据）到角度模型的好习惯是什么？因此，换句话说，如何在角度2中实现自动映射器功能。

team.service.ts

pip install sk-video

team.data.json

import skvideo.io


cap = skvideo.io.vreader(input_video_filepath)
metadata = skvideo.io.ffprobe(input_video_filepath)
framerate = metadata['video']['@r_frame_rate']

for frame in cap:
    # Do whatever you want...
    # "cap" is a generator, the for loop will simply end when there are no more frames
    # "frame" is a NumPy array, just like in OpenCV's VideoCapture

team.model.ts

import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import 'rxjs/add/operator/toPromise';
import { Team } from './team.model';

@Injectable()
export class TeamService {

  constructor(private _http: Http) {
  }

  public GetAllTeams(): Promise<Team[]> {
    return this._http.get('/app/teams/shared/team.data.json')
                    .toPromise()
                    .then(respons => <Team[]> respons.json().data as Team[])
                    .then(data => { return data; });
  }
}

方法{ "data": [ {"id": "1", "name": "Team 1", "otherProperty" : "S1"}, {"id": "2", "name": "Team 2", "otherProperty" : "S2"}, ] }应返回export class Team { private _id: string; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } private _name: string; public get name(): string { return this._name; } public set name(value: string) { this._name = value; } private _icon: string; public get icon(): string { return this._icon; } public set icon(value: string) { this._icon = value; } }个对象。我知道我可以创建接收json数据的工厂并返回Team对象的数组，但是在阅读了这篇文章https://angular.io/docs/ts/latest/guide/dependency-injection.html（car-factory.ts部分）之后，它似乎是糟糕的模式。感谢。

Answer 1

实际上，如果您需要的是强类型，则无需创建类作为模型。您可以改用Interface。

export interface Team {
    id: string;
    name: string;
    icon: stirng;
    someOtherProperty: [];
}

使用Interface的好处是你可以获得强大的输入，而没有为接口生成代码，而类会生成额外的代码。

现在我认为你做出回应转换的方式很好，恕我直言。

public GetAllTeams(): Promise<Team[]> {
    return this._http.get('/app/teams/shared/team.data.json')
                .toPromise()
                .then(respons => respons.json())
                .then(x => x.data);
}

永远记住TypeScript是Javascript +强类型。不要试图引入所有OO实现（虽然它有时很诱人）。

角度2 - 在转换响应到角度模型期间的良好实践

1 个答案: