Angular2 ng-bootstrap nav with nested template-driven form

Question

I've been using the answers (and the article within) from Angular2 nested template driven form to use child-nested form controls. Which is great until I try to use the child component within a Ng-Bootstrap Nav component, like so:

<ul ngbNav #nav="ngbNav" class="nav-tabs">
  <li ngbNavItem>
    <a ngbNavLink>One</a>
    <ng-template ngbNavContent>
      <nav-content-1></nav-content-1>
    </ng-template>
  </li>
</ul>

<form #form="ngForm">
  <div [ngbNavOutlet]="nav"></div>
</form>

@Component({
  selector: 'nav-content-1',
  template: `
    <h5>NavContent1</h5>
    <fieldset ngModelGroup>
      <label>Last Name</label>
      <input type="text" name="lastName" ngModel>
    </fieldset>
  `,
  viewProviders: [{ provide: ControlContainer, useExisting: NgForm }],
})
export class NavContent1Component {}

At this point, I receive the error NullInjectorError: No provider for NgForm.

I'm just starting to get the hang of providers, so bear with me. But it seems like the component declared in ngbNavContent is not being registered as a child of the parent component, and thus is not able to find any of the what-would-be inherited providers.

If that is the case, is there a way to directly reference the NgForm in the parent component from the components in the nav content?

StackBlitz

https://stackblitz.com/edit/angular-ngb-nav-forms-ccgu2u?file=src%2Fapp%2Fnav-content-2.component.ts — yurzui, Jun 21 '20 at 17:27
Wow... okay, yeah that was it. I totally missed that. Thank you @yurzui. — forgetfulbur, Jun 21 '20 at 17:57

score 0 · Accepted Answer · answered Jun 21 '20 at 17:59

Thank you @yurzui for answering my question and showing me the folly of my ways. The form tag needed to be wrapped around the nav as well.

<form #form="ngForm">
  <ul ngbNav #nav="ngbNav" class="nav-tabs">
    <li ngbNavItem>
      <a ngbNavLink>One</a>
      <ng-template ngbNavContent>
        <nav-content-1></nav-content-1>
      </ng-template>
    </li>
  </ul>
  <div [ngbNavOutlet]="nav"></div>
</form>

Angular2 ng-bootstrap nav with nested template-driven form

1 Answers1