表单控件的无值访问器

javascript angular forms form-control

2022-08-30 04:42:41

我正在使用Angular2-rc5，但我目前在登录页面上收到错误。我正在尝试制作一个表单，但控制台抛出异常，告诉我即使我在init上创建它，它也找不到我的表单。任何想法为什么我得到这个错误？formcontroll

登录组件

import { Component, OnInit } from '@angular/core';
import { FormGroup, FormControl, FormBuilder, Validators } from '@angular/forms';
import { LoginService } from './login.service';
import { User } from '../../models/user';
    
@Component({
    selector: 'login',
    providers: [LoginService],
    templateUrl: './login.component.html',
    styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {
    private loginForm: FormGroup; // our model driven form
    private submitted: boolean; // keep track on whether form is submitted
    private events: any[] = []; // use later to display form changes
    
    constructor(private fb: FormBuilder, private ls:LoginService){}
    ngOnInit(){
        this.loginForm = new FormGroup({
            email: new FormControl('',[<any>Validators.required]),
            password: new FormControl('', [<any>Validators.required, <any>Validators.minLength(6)]),
            rememberMe: new FormControl()
        });
    }
    save(model: User, isValid: boolean) {
        console.log("Test");
        console.log(model, isValid);
    }
    // Login in user
    login(email: any, password: any){
        this.ls.login(email, password, false); 
    }
}

页面.html

<div id="login-page">
    <div class="form-wrapper">
        <form class="login-form" [formGroup]="loginForm" novalidate (ngSubmit)="save(loginForm.value, loginForm.valid)">
            <div >
                <div class="input-field col s12 center">
                    <p class="center login-form-text">Login page</p>
                </div>
            </div>
            <div >
                <div class="input-field col s12">
                    <input id="email" type="email"> 
                    <label class="center-align" for="email" formControlName="email">Email</label>
                </div>
            </div>
            <div >
                <div class="input-field col s12">
                    <input id="password" type="password"> 
                    <label class="center" for="password" formControlName="password">Password</label>
                </div>
            </div>
            <div >
                <div class="input-field col s12 m12 l12 login-text">
                    <input id="remember-me" type="checkbox" formControlName="rememberMe">
                    <label for="remember-me">Remember me</label>
                </div>
            </div>
            <div >
                <div class="input-field col s12">
                    <ahref="index.html">Login</a>
                </div>
            </div>
            <div >
                <div >
                    <p><a href="page-register.html">Register Now!</a></p>
                </div>
                <div >
                    <p><a href="page-forgot-password.html">Forgot password ?</a></p>
                </div>
            </div>
        </form>
    </div>
</div>

例外

异常：未捕获（承诺中）：错误：/LoginComponent 类 LoginComponent 中的错误 - 内联模板：13：45 由以下原因引起：没有名称为“email”的表单控件的值访问器.....

答案 1

您正在将添加到标签而不是输入。formControlName

你有这个：

<div >
  <div class="input-field col s12">
    <input id="email" type="email"> 
    <label class="center-align" for="email" formControlName="email">Email</label>
  </div>
</div>

尝试使用以下命令：

<div >
  <div class="input-field col s12">
    <input id="email" type="email" formControlName="email"> 
    <label class="center-align" for="email">Email</label>
  </div>
</div>

同时更新其他输入字段。

答案 2

对于具有角度材质的 UnitTest 角度 2，您必须在导入部分添加 MatSelectModule 模块。

import { MatSelectModule } from '@angular/material';

beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ CreateUserComponent ],
      imports : [ReactiveFormsModule,        
        MatSelectModule,
        MatAutocompleteModule,......

      ],
      providers: [.........]
    })
    .compileComponents();
  }));