Difficulty fetching json data from API using Angular - json

Question

I am trying to fetch data from API https://sportsbook.draftkings.com/api/odds/v1/leagues/3/offers/gamelines.json
and store them in table in my Angular Application. Initial 15 rows are displayed on my page, not all the rows. And I cannot fetch line data which is nested inside outcome object.
Here is my HTML code
<div class="row">
<mat-toolbar color="primary">
<span>Welcome!</span>
</mat-toolbar>
<div class="container">
<br>
<h2>Information</h2>
<span class="right">API endpoint</span>
<table class="table table-hover">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>HomeTeamName</th>
<th>AwayTeamName</th>
<th>Start Date</th>
<th>Offers</th>
<th>Line</th>
<!--<th>Image</th>-->
</tr>
</thead>
<tbody>
<ng-container *ngFor="let data of data.events">
<tr>
<td>{{data.id}}</td>
<td>{{data.name }}</td>
<td>{{data.homeTeamName }}</td>
<td>{{data.awayTeamName}}</td>
<td>{{data.startDate }}</td>
<td>{{data.offers[1].label }}</td>
<td>{{data.offers.outcomes[2].line }}
<!--<td><img class="image-width" src="{{contact.image}}" alt="{{contact.name}}}"></td>-->
</tr>
</ng-container>
</tbody>
</table>
</div>
</div>
Here is my typescript code
import { Component, OnInit } from '#angular/core';
import { Http, Response } from '#angular/http';
import 'rxjs/add/operator/map';
import { MatTableDataSource, MatSort } from '#angular/material';
import { DataSource } from '#angular/cdk/table';
#Component({
selector: 'app-draftking',
templateUrl: './draftking.component.html',
styleUrls: ['./draftking.component.css']
})
export class DraftkingComponent implements OnInit {
private apiUrl = 'https://sportsbook.draftkings.com/api/odds/v1/leagues/3/offers/gamelines.json';
displayedColumns = ['id','name', 'homeTeamName','awayTeamName','offers','line'];
data: any = {};
dataSource = this.data;
constructor(private http: Http) {
this.getLeague1();
this.getData1();
}
getData1(){
return this.http.get(this.apiUrl)
.map((res: Response) => res.json())
}
getLeague1() {
this.getData1().subscribe(data => {
console.log(data);
this.data = data
})
}
ngOnInit() {
}
}

Answer 1

Typically you setup your actual server call in a service (called model because it models your data). Here is one of mine as an example.
service.ts
#Injectable()
export class ApiService {
constructor(private http: HttpClient) { }
public get<T>(path: string, routerParams?: Params): Observable<T> {
let queryParams: Params = {};
if (routerParams) {
queryParams = this.setParameter(routerParams);
}
return this.http.get<T>(this.path(path), { params: queryParams });
}
public put<T>(path: string, body: Object = {}): Observable<any> {
return this.http.put(this.path(path), body);
}
public post<T>(path: string, body: Object = {}): Observable<any> {
return this.http.post(this.path(path), body);
}
public delete<T>(path: string): Observable<any> {
return this.http.delete(this.path(path));
}
...
In my components (sometimes other services) I will call an API method and expect results in the form of an Observable. So in your case I'd use my service like this:
component
constructor(private apiService: ApiService) { }
ngOnInit() {
this.apiService('https://pathtoserver').subscribe(data => {
if (data.id) {
this.setCurrentUser();
}
});
}
Hey remember to NOT call getData1(); more than once or you'll have 2 "hot" subscriptions. Use .pipe(take(1)).sub... in order to end subscriptions once they give you something.