What is the best way to access and utilize an id within an angular component's routing system?

Question

What is the best way to access and utilize an id within an angular component's routing system?

I am currently working on an Angular application, and this is my first experience with JS. I have a main view where I display several elements, such as movies, each of which is clickable and links to a detailed view of the movie. My question is how can I handle the ID that I am passing to the detail view in my component's TypeScript file? I need this ID to fetch the corresponding movie object from the API.

Here is the code I have for the detail view:

export class MovieDetailComponent implements OnInit {
  public movie: MovieResponse[] = []

  constructor(private http: HttpClient,  private sanitizer: DomSanitizer) { }


  async ngOnInit(): Promise<void> {
    const movie = await firstValueFrom(this.http.get<[MovieResponse]>(environment.backend + '/api/v1/movie/' + this.route.snapshot.paramMap.get('id')));
    this.movie = await Promise.all(movie.map(async (movie) => {
      movie.cover_url = <string>this.sanitizer.bypassSecurityTrustResourceUrl(URL.createObjectURL(await firstValueFrom(this.http.get(movie.cover_url, {responseType: 'blob'}))));
      return movie;
    }));
  }
}

I am having trouble resolving

this.route.snapshot.paramMap.get('id')

. What do I need to do to work with the ID I am passing?

Here is the basic flow I am following:

<div [routerLink]="['movie', movie.id]">

-> links to the detail view

In my app-routing.module.ts file, I have integrated the component for the detail view like this:

const routes: Routes = [
  {
    path: '',
    canActivate: [AuthGuard],
    children: [
      {
        path: '',
        component: MediaComponent
      },
      ... additional routes would be here.
      {
        path: 'movie/:id',
        component: MovieDetailComponent
      }
    ]
  }
];

angular typescript

Answer 1

Answer №1

import ActivatedRoute from '@angular/router'

To access the id parameter passed, add the following inside the component constructor:

public actRoute: ActivatedRoute

Now, you can retrieve the id value by using a variable like this:

const id = this.actRoute.snapshot.params.id

Answer 2

import ActivatedRoute from '@angular/router'

To access the id parameter passed, add the following inside the component constructor:

public actRoute: ActivatedRoute

Now, you can retrieve the id value by using a variable like this:

const id = this.actRoute.snapshot.params.id

Answer 3

Answer №2

Discover the correct method to achieve your desired results. Give this approach a try.

export class MovieDetailsComponent implements OnInit {
  movie$!: Observable<Movie>;
enter your code here
  constructor(
    private service: HeroService,
    private route: ActivatedRoute
  ) {}

  ngOnInit() {
    this.movie$ = this.route.paramMap.pipe(
      switchMap(params => {
        const id = params.get('id'));
        return this.service.getMovieDetails(id);
      })
    );
  }
}

Consult the Angular official documentation for more information: https://angular.io/guide/router-tutorial-toh#route-parameters-in-the-activatedroute-service

Answer 4

Discover the correct method to achieve your desired results. Give this approach a try.

export class MovieDetailsComponent implements OnInit {
  movie$!: Observable<Movie>;
enter your code here
  constructor(
    private service: HeroService,
    private route: ActivatedRoute
  ) {}

  ngOnInit() {
    this.movie$ = this.route.paramMap.pipe(
      switchMap(params => {
        const id = params.get('id'));
        return this.service.getMovieDetails(id);
      })
    );
  }
}

Consult the Angular official documentation for more information: https://angular.io/guide/router-tutorial-toh#route-parameters-in-the-activatedroute-service

What is the best way to access and utilize an id within an angular component's routing system?

Answer №1

Answer №2

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