javascript - 无法绑定到“ ngModel”，因为它不是“ input”的已知属性(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.

(即使未显示组件，启动我的Angular应用程序时也会出现以下错误。)

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

(我必须注释掉<input>这样我的应用才能正常工作。)

    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.

(我正在查看Hero插件，但与我的代码没有任何区别。)

Here is the component file:

(这是组件文件：)

    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";
    }

  ask by Anthony Brenelière translate from so

Answer 1

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

(是的就是这样，在app.module.ts中，我刚刚添加了：)

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

[...]

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