TypeError: this.form._updateTreeValidity is not a function

Question

我目前正在使用 Angular Forms 版本 2.0.0 并尝试使用内部联系表格与我们联系。

ContactComponent 加载后，我立即得到：

EXCEPTION: this.form._updateTreeValidity is not a function

我已经看到一些其他堆栈帖子建议使用 FormGroup 而不是 FormBuilder 在组件构造函数中初始化表单对象现在是新 API 的标准，所以我已经更新了那个。
我导入了 ReactiveFormsModule 和 FormsModule 以及所有与表单相关的组件，错误似乎与模块无关。
我的 TypeScript 没有在编译时抛出错误，而且 Visual Studio Intellisense 似乎能够很好地找到所有 FormGroup 函数，那么为什么在运行时会发生这种情况？...

我的代码：

contact.component.ts:

import { Component, Input, ViewChild } from '@angular/core';
import { ApiService } from '../../../services/api.service';
import { ModalComponent } from 'ng2-bs3-modal/ng2-bs3-modal';
import { Router, ActivatedRoute, Params } from '@angular/router';
import { FormsModule, ReactiveFormsModule, FormGroup, FormControl, Validators } from '@angular/forms';
import 'rxjs/Rx';

declare var jQuery: any;

@Component({
    selector: 'my-contact',
    templateUrl: 'app/modules/footer/contact/contact.html'
})
export class ContactComponent {

    private contactForm: FormGroup;
    private invalidEmail: boolean;
    private invalidSubject: boolean;
    private invalidMessage: boolean;

    constructor(private apiService: ApiService, private router: Router, private route: ActivatedRoute) {
        this.contactForm = new FormGroup({
            emailControl: new FormControl('', <any>Validators.required),
            subjectControl: new FormControl('', <any>Validators.required),
            messageControl: new FormControl('', <any>Validators.required)
        });
    }

    submit() {

        if (this.contactForm.valid) {
            this.apiService.sendMessage(this.contactForm.controls['emailControl'].value, this.contactForm.controls['subjectControl'].value, this.contactForm.controls['messageControl'].value);
        }

        if (!this.contactForm.controls['emailControl'].valid) {
            this.invalidEmail = true;
        }
        if (!this.contactForm.controls['subjectControl'].valid) {
            this.invalidSubject = true;
        }
        if (!this.contactForm.controls['messageControl'].valid) {
            this.invalidMessage = true;
        }

    }

    ngOnInit() {
        this.invalidEmail = false;
        this.invalidSubject = false;
        this.invalidMessage = false;
    }

}

contact.html:

<modal-header class="c-no-border" [show-close]="true">
  <h4 class="modal-title text-uppercase">Send us a message</h4>
</modal-header>

<form novalidate #contactForm [formGroup]="contactForm" (ngSubmit)="submit()">
  <div class="modal-body">
    <div class="form-group">
      <label for="email" class="control-label">Email</label>
      <input name="email" formControlName="emailControl" placeholder="" type="text" class="c-square form-control c-margin-b-20" id="email">
      <div class="c-font-red-1" *ngIf="invalidEmail" style="position: absolute;">*Required</div>
      <label for="subject" class="control-label">Subject</label>
      <input name="subject" formControlName="subjectControl" placeholder="" type="text" class="c-square form-control c-margin-b-20" id="subject">
      <div class="c-font-red-1" *ngIf="invalidSubject" style="position: absolute;">*Required</div>
      <textarea formControlName="messageControl" style="resize: vertical;" class="c-square form-control c-margin-b-20" id="content" (keyup.enter)="submit()"></textarea>
      <div class="c-font-red-1" *ngIf="invalidMessage" style="position: absolute;">*Required</div>
    </div>
  </div>
  <modal-footer class="c-no-padding">
    <button type="button" class="btn c-btn-square c-btn-bold c-btn-uppercase pull-right">Cancel</button>
    <button type="submit" class="btn c-theme-btn c-btn-square c-btn-bold c-btn-uppercase pull-right" style="margin-right: 10px;">Send</button>
  </modal-footer>
</form>

app.module.ts:

import { NgModule, enableProdMode }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { Ng2Bs3ModalModule } from 'ng2-bs3-modal/ng2-bs3-modal';
import { QueuesModule }     from './modules/queues/queues.module';
import { OrderModule }     from './modules/order/order.module';
import { AccountModule } from './modules/account/account.module';
import { AdminModule } from './modules/admin/admin.module';
import { routing } from './app.routing';
import { GridModule } from '@progress/kendo-angular-grid';
import { SplashComponent } from './modules/splash/splash.component';
import { ContactComponent } from './modules/footer/contact/contact.component';

import { SharedModule } from './shared/shared.module';
import { EmailValidator } from './shared/utilities/custom-validators'

import { CookieService } from 'angular2-cookie/services/cookies.service';
import { HttpModule, Response } from '@angular/http';
import { StringService } from './services/string.service';
import { ApiService } from './services/api.service';
import { UserService } from './services/user.service';
import { OrderService } from './services/order.service';
import { OrderGuard } from './services/order-guard.service';
import { FooterComponent } from './modules/footer/footer.component';
import { ErrorComponent } from './modules/error/error.component';
import { CustomFormsModule } from "ng2-validation";

@NgModule({
    imports: [
        BrowserModule,
        FormsModule,
        ReactiveFormsModule,
        HttpModule,
        QueuesModule,
        OrderModule,
        AccountModule,
        AdminModule,
        routing,
        GridModule,
        SharedModule,
        Ng2Bs3ModalModule,
        CustomFormsModule
    ],
    declarations: [
        AppComponent,
        SplashComponent,
        FooterComponent,
        ErrorComponent,
        ContactComponent
    ],
    providers: [
        StringService,
        ApiService,
        UserService,
        CookieService,
        OrderService,
        OrderGuard
    ],
    bootstrap: [AppComponent],
    exports: [
    ]
})

export class AppModule {
}

Answer 1

绑定模板变量 #contactForm 似乎会导致名称冲突并在模板处理器试图将附加的模板变量转换为后端的 NgForm 时炸毁模板处理器。我到处都看到使用模型驱动表单，表单上没有模板变量绑定，而模板驱动表单中使用了 #tv="ngForm"。两种形式的混合方法似乎有失误，导致了错误。

只需将其删除即可解决问题。

Answer 2

我有一个动态表格。我遇到了上述错误，因为我没有在 ngOnInit()

中初始化它

解法：

checkInForm: FormGroup;

ngOnInit(){
    this.checkInForm = this.formBuilder.group({});
}

Answer 3

已经有一段时间了，但对我来说问题是将 formGroup 传递给模板而不是直接引用它。

例如这是不工作

<ng-template #selectField
             let-field
             let-group
             let-frmName="frmName">
    <ng-container [formGroup]="group">
        <mat-form-field fxFlex="32"
                        floatLabel="always">
            <mat-label>{{field.label}}</mat-label>
            <mat-select [formControlName]="frmName"
                        [required]="field.required">
                <mat-option *ngFor="let option of field.options"
                            [value]="option.value">
                    {{option.description}}
                </mat-option>
            </mat-select>
        </mat-form-field>
    </ng-container>
</ng-template>

如果我直接使用我的 formGroup 实例，它工作得很好。

希望对您有所帮助。

Answer 4

当您在非表单控件的自定义组件上使用输入名称 formControl 或 formGroup 时，可能会发生这种情况。

更改自定义组件以接受不同的输入名称：

改变这个

@Input()
formGroup: string
// ^ Causes issues

对此

@Input()
group: string

Answer 5

如果您错误地添加到模板 formGroup="..." 而不是 [formGroup]="..."，您也会收到此错误消息。

Answer 6

我忘记将我的表单传递给可重复使用的输入 <app-input [form]="myForm"></app-input>

app-input.component.html

<form [formGroup]="form">
  <input [type]="type" [placeholder]="placeholder [formControlName]="formControlName" />
</form>

app-input.component.ts

  @Input() type: string = '';
  @Input() placeholder: string = '';
  @Input() formControlName: string = ''
  @Input() form: FormGroup = {} as FormGroup;

TypeError: this.form._updateTreeValidity is not a function

TypeError: this.form._updateTreeValidity is not a function

javascript

validation

typescript

angular2-forms

angular

改变这个

对此