No provider for NgModel! (Typeahead -> NgModel) exception when adding ngControl to bootstrap 4 TypeHead angular 2

Question

I am trying to add ngControl form validation to bootstrap 4 typehead control in Angualr js 2. code is as follows.

<input [(ngModel)]="model.brand" [typeahead]="model.brands" ng-model-options="{'updateOn': 'blur'}"
        (typeaheadOnSelect)="brandOnSelect($event)" (typeaheadNoResults)="brandNoResults($event)"
        [typeaheadOptionField]="'Value'" class="form-control" ngcontrol="brand" >
        <div *ngIf="brand.dirty && !brand.valid ">
            <p  *ngIf="brand.errors.required" class="text-help">{{ required }}</p>
        </div>

Answer 1

You have missed "name" attribute on input which is required to work ngModel properly.