Exploring the creation of an Angular service that utilizes HttpClient for making GET requests, with a focus on the different

I've been diving into Angular lately and I'm facing some challenges with handling get requests. If you're interested, you can check out my code on Angular Stackblitz

import { HttpClient} from '@angular/common/http';
import { Injectable } from '@angular/core';
import { catchError, map, Observable, throwError } from 'rxjs';



@Injectable({
  providedIn:'root'
})
export class PostsService {

  constructor(private http:HttpClient) { }
  getPosts():Observable<Post[]>{
    return this.http.get<any>('https://dummyjson.com/posts').pipe(
    map(res=> res.posts),
      catchError(err=>{
        console.log(err)
        return throwError(()=>err)
      })
    )
  }
}
interface PostResponse{
  limit: number
  posts: string[]
  skip: number
  total: number
}
interface Post {
  body: string
id: number
reactions: number
tags: string[]
title: string
userId: number
}

Typically, I resort to using the any type instead of PostResponse or Post[], but I realize it might not be the best practice. The map operator adds complexity to the situation. So, in this scenario, what would be the ideal type for the get request?

Answer №1

The issue lies in defining the posts attribute of the PostResponse interface as a string array (string[]) instead of the correct type, which should be an array of Post objects (Post[]):

interface PostResponse {
  limit : number;
  skip  : number;
  total : number;
  posts : Post[];
}

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