How can I implement a selection list using these three models? I do so:
html:
<ng-container [(ngModel)]='user.id' name="id" >
<select *ngFor="let userRole of userRoles" required>
<option *ngFor="let role of roles" [ngValue]="role.role_id">
{{role.name}}
</option>
</select>
</ng-container>
But in the end get a duplicate of the "select" component. And I get this error:
ERROR Error: Uncaught (in promise): Error: No value accessor for form control with name: 'id' Error: No value accessor for form control with name: 'id'
Let's start with your model.
export class User {
constructor(
public id: number,
public role: Role,
) {}
}
export class Role {
constructor(
public id: number,
public label: string,
) {}
}
Now with your select.
<select [(ngModel)]="user.roles">
<option *ngFor="let role of roles" [ngValue]="role"> {{ role.label }} </option>
</select>
Which gives as a result, this stackblitz
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