Pagination in Angular with NgRX?

Question

SQL

Help implement client-side pagination. The state gets the entire list of objects, you need to display 5 objects on each of the pages. I attached the effect of the service below (I don’t know what to attach)

loadNews$ = createEffect(() => this.actions$.pipe(
    ofType(newsActions.loadNews),
    mergeMap( () => this.newsService.getNewsAll().pipe(
      map(result => newsActions.loadNewsSuccess({ result })),
      catchError(error => of(newsActions.loadNewsFailed({ error })))
    ))
  ));

And service:

getNewsAll(): Observable<NewsModel> {
    return this.http.get<NewsModel>(this.newsAllUrl);
  }

Answer 1

join P urchase_item pi
JOIN p urchase_item pi

Answer 2

purchase.id