Javascript 类型错误：无法在 setUpControl 的字符串 '[email protected]' 上创建属性 'validator'
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/43603543/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
TypeError: Cannot create property 'validator' on string '[email protected]' at setUpControl
提问by Gunjan Patel
I face issue in formGroup. First Based on URL I take some value and call to API for retrieve particular user-data for pre-field text.
我在formGroup. 首先基于 URL 我取一些值并调用 API 以检索预字段文本的特定用户数据。
register.html
注册.html
<form [formGroup]="form" (ngSubmit)="onSubmit(form.value)" class="form-horizontal">
<div class="form-group row">
<label for="inputEmail3" class="col-sm-4 ">Username</label>
<div class="col-sm-8">
<input [formControl]="email" type="text" class="form-control" id="inputEmail3" placeholder="Email Address" [readonly]="isReadOnly">
</div>
</div>
</form>
register.component.ts
注册.component.ts
import { Component } from '@angular/core';
import { FormGroup, AbstractControl, FormBuilder, Validators } from '@angular/forms';
import { Router, ActivatedRoute } from '@angular/router';
import { EmailValidator, EqualPasswordsValidator } from '../../theme/validators';
@Component({
selector: 'register',
templateUrl: './register.html',
})
export class Register {
public form: FormGroup;
public email: AbstractControl;
public username: string;
constructor(private registerService: RegisterService, fb: FormBuilder, private router: Router, private route: ActivatedRoute) {
this.form = fb.group({
'email': ['', Validators.compose([Validators.required])]
.... etc..
});
this.email = this.form.controls['email'];
this.registerService.getUser({ userId: "asdasd2123da2das" }).subscribe(posts => {
if (posts) {
var userObj = posts.json();
console.log("userObj : ", userObj.data);
if (userObj.data && userObj.data[0].email) {
this.email = this.username = userObj.data[0].email; // ouput : [email protected]
this.isReadOnly = true;
this.router.navigateByUrl('/register');
} else {
alert("You are Not Autorize to access this Page");
this.router.navigateByUrl('/login');
}
}
});
}
}
Error Details :
错误详情 ：
TypeError: Cannot create property 'validator' on string '[email protected]'
at setUpControl (http://localhost:3004/vendor.dll.js:9739:23)
at FormControlDirective.ngOnChanges (http://localhost:3004/vendor.dll.js:44196:89)
at Wrapper_FormControlDirective.ngDoCheck (/ReactiveFormsModule/FormControlDirective/wrapper.ngfactory.js:50:18)
回答by sainu
<form [formGroup]="form" (ngSubmit)="onSubmit(form.value)" class="form-horizontal">
<div class="form-group row">
<label for="inputEmail3" class="col-sm-4 ">Username</label>
<div class="col-sm-8">
<input formControlName="email" type="text" class="form-control" id="inputEmail3" placeholder="Email Address" [readonly]="isReadOnly">
</div>
</div>
</form>
please try like this change [formControl]to formControlName.
请尝试将此更改[formControl]为formControlName.
And to set the output to the input field please do the following, point the line this.form.patchValue
并将输出设置为输入字段，请执行以下操作，指向线 this.form.patchValue
import { Component } from '@angular/core';
import { FormGroup, AbstractControl, FormBuilder, Validators } from '@angular/forms';
import { Router, ActivatedRoute } from '@angular/router';
import { EmailValidator, EqualPasswordsValidator } from '../../theme/validators';
@Component({
selector: 'register',
templateUrl: './register.html',
})
export class Register {
public form: FormGroup;
public email: AbstractControl;
public username: string;
constructor(private registerService: RegisterService, fb: FormBuilder, private router: Router, private route: ActivatedRoute) {
this.form = fb.group({
'email': ['', Validators.compose([Validators.required])]
.... etc..
});
this.email = this.form.controls['email'];
this.registerService.getUser({ userId: "asdasd2123da2das" }).subscribe(posts => {
if (posts) {
var userObj = posts.json();
console.log("userObj : ", userObj.data);
if (userObj.data && userObj.data[0].email) {
this.email = this.username = userObj.data[0].email; // ouput : [email protected]
this.form.patchValue({
email : this.email
});
this.isReadOnly = true;
this.router.navigateByUrl('/register');
} else {
alert("You are Not Autorize to access this Page");
this.router.navigateByUrl('/login');
}
}
});
回答by Viswa
I missed the square brackets in formGroup in markup as below
我错过了标记中 formGroup 中的方括号，如下所示
<form formGroup="form">
</form>
and it throws similar error as
它抛出类似的错误
ERROR TypeError: Cannot create property 'validator' on string 'form'
错误类型错误：无法在字符串 'form' 上创建属性 'validator'
Once the square brackets added in formGroup (see below), the error disappears
一旦在formGroup中添加方括号（见下文），错误就会消失
<form [formGroup]="form">....</form>
回答by Vinayak Shedgeri
For complete information about each kind of form, see Reactive Forms and Template-driven Forms from the https://angular.io/guide/forms-overviewwebsite. you are missing actual syntax for Grouping form controls and Registering the control in the template.both are valid in different case
有关每种表单的完整信息，请参阅https://angular.io/guide/forms-overview网站上的Reactive Forms 和 Template-driven Forms 。您缺少分组表单控件和在模板中注册控件的实际语法。两者在不同情况下都有效
<input type="text" [formControl]="name">
<input type="text" formControlName="firstName">
