Angular - 没有将 "exportAs"设置为 "ngModel"的指令

Question

以下是 AngularJS 项目中的文件。正如一些帖子中所建议的，我添加了:

ngModel name="currentPassword" #currentPassword="ngModel 

在输入字段中，但仍然出现错误。

package.json

.........
"dependencies": {
        "@angular/common": "^2.3.1",
        "@angular/compiler": "^2.3.1",
        "@angular/core": "^2.3.1",
        "@angular/forms": "^2.3.1",
        "@angular/http": "^2.3.1",
        "@angular/platform-browser": "^2.3.1",
        "@angular/platform-browser-dynamic": "^2.3.1",
        "@angular/router": "^3.3.1",
        "core-js": "^2.4.1",
        "rxjs": "^5.0.1",
        "ts-helpers": "^1.1.1",
        "zone.js": "^0.7.2"
    },
   ...............

change-password.component.html

<form #f="ngForm" [formGroup]="changePasswordForm">
        <div class="form-group">
            <label for="currentPassword">Current Password</label> <input
                placeholder="currentPassword" ngModel name="currentPassword"
                #currentPassword="ngModel" id="currentPassword"
                name="currentPassword" type="text" class="form-control" required
                minlength="6" formControlName="currentPassword">
            </div>
        </div>
        <button class="btn btn-primary" type="submit">Change Password</button>
    </form>

change-password.component.ts

import { Component, OnInit } from '@angular/core';
import { FormBuilder, Validators, ControlContainer, FormGroup, FormControl } from '@angular/forms';

@Component({
  selector: 'app-change-password',
  templateUrl: './change-password.component.html',
  styleUrls: ['./change-password.component.css']
})
export class ChangePasswordComponent implements OnInit {

  changePasswordForm;

  constructor(formBuilder: FormBuilder) {
    this.changePasswordForm = formBuilder.group({
      currentPassword: new FormControl('', Validators.compose([Validators.required]))
    });
  }

  ngOnInit() {
  }

}

app.module.ts 有导入

............
imports: [
    BrowserModule,
    HttpModule,
    FormsModule,
    ReactiveFormsModule
  ]
...........

我收到以下错误:

Unhandled Promise rejection: Template parse errors: There is no directive with "exportAs" set to "ngModel" ("urrent Password ]#currentPassword="ngModel" id="currentPassword" name="currentPassword" type="text" class="form-co"): ChangePasswordComponent@5:4 ; Zone: ; Task: Promise.then ; Value: SyntaxError {__zone_symbol__error: Error: Template parse errors: There is no directive with "exportAs" set to "ngModel" ("urrent Passwo……} Error: Template parse errors: There is no directive with "exportAs" set to "ngModel" ("urrent Password ]#currentPassword="ngModel" id="currentPassword" name="currentPassword" type="text" class="form-co"): ChangePasswordComponent@5:4 at SyntaxError.ZoneAwareError (http://localhost:4200/polyfills.bundle.js:6884:33) at SyntaxError.BaseError [as constructor] (http://localhost:4200/vendor.bundle.js:64475:16) at new SyntaxError (http://localhost:4200/vendor.bundle.js:5727:16)

Answer 1

添加 import { FormsModule } from '@angular/forms';到您的 app.module.ts 并在您需要添加 FormsModule 的导入数组中。

答案已经很晚了，但如果有人在 Angular 5 中遇到问题，你需要这样做。