Angular 2 RC4中的表格 [英] Forms in Angular 2 RC4
问题描述
我正在Angular 2 RC4中试用表格. 一切正常,但是当我启动应用程序时,浏览器控制台会显示以下消息:
I am experimenting with forms in Angular 2 RC4. It's all working fine but when I start the app the browser console gives me this message:
*It looks like you're using the old forms module. This will be opt-in in the next RC, and will eventually be removed in favor of the new forms module.
我组件的相关部分如下:
The relevant part of my component looks like this:
import {
FORM_DIRECTIVES,
REACTIVE_FORM_DIRECTIVES,
FormBuilder,
FormGroup
} from '@angular/forms';
import {Observable} from "rxjs/Rx";
@Component
({
selector: "hh-topbar",
moduleId: module.id,
templateUrl: "topBar.component.html",
directives: [HHPagerComponent, FORM_DIRECTIVES, REACTIVE_FORM_DIRECTIVES]
})
export class HHTopBarComponent implements OnChanges, OnInit
{
...
private filterForm: FormGroup;
private title$: Observable<string>;
constructor(private formBuilder: FormBuilder)
{
}
public ngOnInit(): any
{
this.filterForm = this.formBuilder.group
({
"title": [this.info.filters.searchFileName]
});
this.title$ = this.filterForm.controls["title"].valueChanges;
this.title$.subscribe(val =>
{
this.info.filters.searchFileName = val;
this.filterChanged.emit(this.info.filters);
});
}
}
模板的相关部分如下所示:
And the relevant part of my template looks like this:
<form [formGroup]="filterForm">
<div>
<label for="title">Title</label>
<input [formControl]="filterForm.controls['title']" id="title" />
</div>
</form>
这里有人知道警告正在谈论的新表单模块是什么,哪些指令将更改以及更改为什么?
Does anybody here know what is the new forms module the warning is talking about and which directives will change and to what?
推荐答案
在引导应用程序时,您需要显式禁用弃用的表单支持:
You need to explicitly disable the deprecated form support when bootstrapping your application:
import {disableDeprecatedForms, provideForms} from '@angular/forms';
bootstrap(AppComponent, [
disableDeprecatedForms()
provideForms()
]);
不推荐使用FormBuilder
,而可以直接使用FormGroup
类:
Whereas FormBuilder
isn't deprecated, you can use directly the FormGroup
class instead:
this.filterForm = new FormGroup({
title: new FormControl('', Validators.required)
});
这篇关于Angular 2 RC4中的表格的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!