Hi Ronald,
I think the backend is returning an array of header and not a single
instance (and there is no children property in an array).
You can see what is returned in the console :
forkJoin ([mainHeaders, subHeaders]). subscribe (results => {
console.log ('results', results);
results [0] .children = results [1];
})
The take operator can also be useful in some cases:
forkJoin ([mainHeaders, subHeaders]). smoking pipe (
tap (result => console.log ('results', results)
) .subscribe (results => {
results [0] .children = results [1];
})
NB: there may be typos
Regards,
Arnaud.
On Friday, 19 February 2021 at 20:49:01 UTC+1 [email protected] wrote:
> I am getting an error that says "property does not exist on type" but the
> property does exist. I am trying to use a forkJoin. Here is the code for
> that:
>
> getCombined() {
>
> let mainHeaders =
> this.http.get<Header[]>(`${this.backendUrl}/api/header`);
>
> let subHeaders =
> this.http.get<Children[]>(`${this.backendUrl}/api/header/children`)
>
> forkJoin([mainHeaders, subHeaders]).subscribe(results => {
> results[0].children = results[1];
> })
> }
>
> It says "property 'children' does not exist on type 'Header[]' but here is
> my header definition:
>
> export class Header{
> headerID: number;
> headerName: string;
> hidden: boolean;
> children: Array<any>;
> }
>
> I have also tried:
>
> import { Children } from '../definitions/children';
>
> export class Header{
> headerID: number;
> headerName: string;
> hidden: boolean;
> children: Array<Children>;
> }
>
> Also:
>
> children: Children;
>
> and
>
> children: Children[];
>
> in the above class.
>
> What am I missing?
>
> Thank you in advance for any assistance!
>
> Ronnie
>
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