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我目前正在使用 Angular Forms 2.0.0 版，并试图通过内部联系表格与我们联系。
ContactComponent 加载后，我立即得到：
例外：this.form._updateTreeValidity 不是函数
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，所以我已经更新了它。
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，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：
接触.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;
}
}
联系人.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>
应用程序模块.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 {
}
原文由 Harish Vangavolu 发布，翻译遵循 CC BY-SA 4.0 许可协议
绑定模板变量
#contactForm似乎会导致名称冲突并炸毁模板处理器，因为它试图在后端将附加的模板变量转换为NgForm。我在任何地方都看到使用模型驱动表单，表单上没有模板变量绑定，而在模板驱动表单中使用了#tv="ngForm"。似乎在混合两种形式的方法时出现了失误，导致了错误。只需将其删除即可解决问题。