Can't bind to 'ngModel' since it isn't a known property of 'input'

Question

I've got the following error when launching my Angular app, even if the component is not displayed.

I have to comment out the <input> so that my app works.

zone.js:461 Unhandled Promise rejection: Template parse errors:
Can't bind to 'ngModel' since it isn't a known property of 'input'. ("
   <div>
      <label>Created:</label>
      <input  type="text" [ERROR ->][(ngModel)]="test" placeholder="foo" />
   </div>
</div>"): InterventionDetails@4:28 ; Zone: <root> ; Task: Promise.then ; Value: 

I'm looking at the Hero plunker, but I don't see any difference from my code.

Here is the component file:

import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core';
import { Intervention } from '../../model/intervention';

@Component({
   selector: 'intervention-details',
   templateUrl: 'app/intervention/details/intervention.details.html',
   styleUrls: ['app/intervention/details/intervention.details.css']
})

export class InterventionDetails
{
   @Input() intervention: Intervention;

   public test : string = "toto";
}

Answer 1

Yes that's it, in the app.module.ts, I just added :

import { FormsModule } from '@angular/forms';

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})