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pythonjsonangularfastapiangular-httpclient

API(get) response(JSON) not display in ngFor - Angular


I trying to get a response in JSON of my API and display the values in my Angular page, using a ngFor

I don't have any build errors, the values simply don't display on the page, only in console, using console.log(), so I can't understand.

This is my component.ts:

import { HttpClient } from '@angular/common/http';
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-vps',
  templateUrl: './vps.component.html',
  styleUrls: ['./vps.component.scss'],
})

export class VpsComponent implements OnInit {
  vpsOptions: any;
  baseUrl: string = "http://127.0.0.1:8000/"
  valor: number = 555;
  tipo: any = "mês";

ngOnInit(): void {
   this.getVps()
   console.log("ngOnInit")
   console.log(this.vpsOptions)
}

constructor(private httpClient: HttpClient) {
    this.vpsOptions = []
}
public getVps() {
 this.httpClient.get(this.baseUrl+'vps').subscribe((result:any) =>{
  for(let item in result){
   this.vpsOptions.push(result[item]);
  }
});

This is my component.html:

<ng-container *ngFor="let vps of vpsOptions">
      <div class="swiper-slide">
        <div class="mini-card">
          <div class="card-header img-fluid border-0">
            <h3 class="card-title titulo-mini-card">{{vps.nome}}</h3>
          </div>
          <div class="card mb-xl-8">
            <div class="card-body body-vps pt-0">
              <p class="texto-vps">
                <span class="primeira-linha"> R$ <span class="valor-vps">{{valor}},00</span>/{{tipo}}</span> <br>
                <span class="descritivo-valor">**Preço na contratação de 48 meses </span><br>
                {{vps.processador}} <br>
                {{vps.memoria}} <br>
                {{vps.disco1}} de Armazenamento <br>
                {{vps.banda}} de Banda <br>
                {{vps.ips}} IP(s) dedicado(s) <br>
                100% Acesso Root <br>
                100Mb/s Rede <br>
                Suporte 8/5 <br> <br>
                <button type="submit" class="btn btn-primary" style="background-color: #213B89;"
                >Solicitar Orçamento</button>
                <!-- <a class="link-vps" href="">Veja todas as caracterísicas</a> -->
              </p>
            </div>
          </div>
        </div>
      </div>
</ng-container>

This is my response API(I'm using fastAPI of Python):

API RESPONSE

This is the response in console of browser: CONSOLE LOG BROWSER


Solution

  • I refactored my code and create other classes to abstract some functions, to be more practice.

    I created an interface.ts, to format my get:

    export interface Vps{
      id?: number;
      nome?:string;
      ...
    

    I created a service.ts, to abstract the httpClient.get() function:

    import { Vps } from './vps.interface';
    import { Observable } from 'rxjs';
    import { HttpClient } from '@angular/common/http';
    import { Injectable } from '@angular/core';
    
    @Injectable({ providedIn: 'root' })
    
    export class VpsService {
      private readonly baseUrl: string = "http://127.0.0.1:8000/"
      constructor(private httpClient: HttpClient) {}
    
      getVps(): Observable<Vps[]> {
        const url = this.baseUrl+'vps';
        return this.httpClient.get<Vps[]>(url);
      }
    }
    

    Thanks @Dario for the answer, I used and Observable<Vps[]>: //declaring the object

    vpsOptions: Observable<Vps[]>;
    

    //Initializing the object calling the service.ts

    constructor(private vpsService: VpsService) {
        this.vpsOptions = this.vpsService.getVps();
      }
    

    //Finally, I changed the component.html to receive the object(Observable) correctly

    <ng-container *ngIf="vpsOptions | async as options">
        <ng-container *ngFor="let option of options">
             <!-- my display logic here -->
         </ng-container>
    </ng-container>