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Angular 2 错误 - 没有带有“exportAs"的指令；设置为“ngModel"带有 RC4 版本
[英] Angular 2 error- There is no directive with "exportAs" set to "ngModel" with RC4 version
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问题描述
我在我的应用程序中使用了 angular 2 表单，并且我已经根据给定的链接创建了表单.
https://angular.io/docs/ts/latest/guide/forms.html
为了验证和使用表单 API，我设置了 ngModel 值，例如 #name="id" #id="ngModel" 并抛出脚本错误.但是如果我将 #id="ngModel" 设置为 #id="ngForm"，它就解决了.但就我而言，我必须将模型值设置为 ngModel.
下面是我的 html 页面.
<div class="form-group"><label for="name">员工姓名</label><input type="text" class="form-control" [(ngModel)]="model.name" name="name" #name="ngModel" required><div [hidden]="name.valid || name.pristine" class="alert alert-danger">必须提供员工 ID
<div class="form-group"><label for="DOJ">DOJ</label><input class="form-control" required [(ngModel)]="model.DOJ" name="DOJ" #DOJ="ngModel"/><div [hidden]="DOJ.valid || DOJ.pristine" class="alert alert-danger">司法部是必需的
<button type="submit" class="btn btn-default" [disabled]="!myForm.form.valid">提交</button></表单>
下面是我的问题.
例外:模板解析错误:没有将exportAs"设置为ngModel"(<div><h1>我的表单</h1><form (ngSubmit)="onSubmit()" [错误 ->]#myForm="ngModel"><div class="form-group><label class="control-label" for="id">Employee"):AppComponent@3:34
我检查了更多的问题和答案，他们中的大多数人说要将 angular2 版本更新为 RC4，所以我已将我的应用程序更新为 rc4，但我仍然面临这个问题.
下面是我的 ts 文件:
import {Component} from '@angular/core';import { disableDeprecatedForms, provideForms , NgForm} from '@angular/forms';从@angular/common"导入 {CORE_DIRECTIVES, FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup };@成分({选择器:'ej-app'，templateUrl: 'app/app.component.html',指令:[ CORE_DIRECTIVES,FORM_DIRECTIVES]})导出类 AppComponent {模型 = 新员工(空，''，'');onSubmit() { alert("提交的值")}构造函数(){}}出口类员工{构造函数(公共 ID:编号，公共名称:字符串，公共司法部:字符串){ }}
解决方案
不要混用新旧表单模块.
import {CORE_DIRECTIVES, FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup } from '@angular/common';
从 @angular/common 导入表单内容.如果您使用新表格
bootstrap(AppComponent, [disableDeprecatedForms(), provideForms()])
然后改用
import {FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup } from '@angular/forms';
I am using angular 2 forms in my application and i have created the forms based on given link.
https://angular.io/docs/ts/latest/guide/forms.html
In this for validation and to use forms APIs, i have set the ngModel values like #name="id" #id="ngModel" and which throws script error. But its resolved if i set #id="ngModel" as #id="ngForm". But for my case i have to set my model value to ngModel.
Below is my html page.
<form (ngSubmit)="onSubmit()" #myForm="ngForm">
<div class="form-group">
<label class="control-label" for="id">Employee ID</label>
<input type="text" class="form-control" required [(ngModel)]="model.id" #name="id" #id="ngModel" >
<div [hidden]="id.valid || id.pristine" class="alert alert-danger">
Employee ID is required
</div>
</div>
<div class="form-group">
<label for="name">Employee Name</label>
<input type="text" class="form-control" [(ngModel)]="model.name" name="name" #name="ngModel" required>
<div [hidden]="name.valid || name.pristine" class="alert alert-danger">
Employee ID is required
</div>
</div>
<div class="form-group">
<label for="DOJ">DOJ</label>
<input class="form-control" required [(ngModel)]="model.DOJ" name="DOJ" #DOJ="ngModel" />
<div [hidden]="DOJ.valid || DOJ.pristine" class="alert alert-danger">
DOJ is required
</div>
</div>
<button type="submit" class="btn btn-default" [disabled]="!myForm.form.valid">Submit</button>
</form>
Below is my issue.
EXCEPTION: Template parse errors:
There is no directive with "exportAs" set to "ngModel" ("
<div>
<h1>My Form</h1>
<form (ngSubmit)="onSubmit()" [ERROR ->]#myForm="ngModel">
<div class="form-group>
<label class="control-label" for="id">Employee"):AppComponent@3:34
I have checked with more questions and answers, most of them said to update angular2 version to RC4 so i have updated my application to rc4 but still i am facing this issue.
Below is my ts file:
import {Component} from '@angular/core';
import { disableDeprecatedForms, provideForms , NgForm} from '@angular/forms';
import {CORE_DIRECTIVES, FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup } from '@angular/common';
@Component({
selector: 'ej-app',
templateUrl: 'app/app.component.html',
directives: [ CORE_DIRECTIVES,FORM_DIRECTIVES]
})
export class AppComponent {
model = new Employees(null,'','');
onSubmit() { alert("values submitted")}
constructor() {
}
}
export class Employees {
constructor( public id: number,public name: string, public DOJ: String ) { }
}
解决方案
Don't mix the new and old forms module.
import {CORE_DIRECTIVES, FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup } from '@angular/common';
imports forms stuff from @angular/common. If you use the new forms
bootstrap(AppComponent, [disableDeprecatedForms(), provideForms()])
then use instead
import {FORM_DIRECTIVES, FormBuilder,Validators,Control,ControlGroup } from '@angular/forms';
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