What is the best way to retrieve information utilizing Http.get within my project?

I have a TypeScript file containing user data:

File path: quickstart-muster/app/mock/user.mock.ts

import {User} from "../user";

export const USERS:User[]=[
  new User(....);
];

I have a service set up at: quickstart-muster/app/services/user.service.ts

import { Injectable } from '@angular/core';
import {Observable} from "rxjs/Observable"
import 'rxjs/add/operator/map';
import 'rxjs/add/observable/fromPromise';
import 'rxjs/add/operator/toPromise';
import {Http} from "@angular/http";
import {User} from "../user";

@Injectable()
export class UserService {

  constructor(private http:Http){}

  public loadUsers():Observable<User[]>{
    return this.http.get('../mock/user.mock.ts')
      .map(res=>res.json());
  }
}

I am facing an issue where I receive a 404 error stating that the file .../mock/user.mock.ts cannot be found.

How can I resolve this issue and make it work?

Answer №1

If you want to fetch data from an API, you can also load a JSON file that simulates the API response:

/data.json

[
    {
        "id": 1234,
        "name": "...",
        ...
    },
    ...
]

Once you have the JSON file, you can retrieve the data using this method:

public loadUsers(): Observable<User[]>{
  return this.http.get('data.json')
    .map(res => res.json());
}

Alternatively, you can create an Observable from scratch like this:

public loadUsers(): Observable<User[]> {
    return Observable.create((observer) => {
        observer.onNext(USERS);
        observer.onCompleted();
    });
}

Answer №2

Opt for Promise.resolve over using http get

function fetchUsers():Observable<User[]>{
    return Promise.resolve([ new User(....);]);
  }

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