angular - 具有角反应形式的角材料,面临错误
问题描述
我正在使用角材料处理角反应形式,但出现一个错误,它在 stackblitz 中工作正常,但在我的本地机器中却没有。它显示带有“确认”的控制是未定义的。我无法弄清楚它为什么显示。
formControlName="confirm" shows error
<form class="flex flex-column flex-row-ns flex-wrap mt2" [formGroup]="emailForm" (ngSubmit)="onSubmit();">
<mat-form-field class="w-50-ns pr2-ns" formGroupName="userData">
<mat-label>Email</mat-label>
<input matInput type="email" placeholder=" Email address" formControlName="email" (blur)="suggestEmail()" />
<mat-error *ngIf="f.invalid && f.touched && (f.errors?.email || f.errors?.required)">
Please enter a valid email address
</mat-error>
<mat-error (click)="clickme()" *ngIf="f.invalid && f.touched && f.errors?.has_suggestion">
Do you mean:
<span class="text-color"> {{suggestedEmail}} </span>
</mat-error>
</mat-form-field>
<mat-form-field class="w-50-ns pr2-ns">
<mat-label>Confirm Email</mat-label>
<input matInput type="text" formControlName="confirm" placeholder="confirm your email address" />
<mat-error *ngIf="submitted && (isEmailMismatch || f.confirm?.errors)" class="invalid-feedback">
<mat-error *ngIf="f.touched && f.confirm?.errors.required">Confirm Email is required</mat-error>
<mat-error *ngIf="f.touched && isEmailMismatch">Emails must match</mat-error>
</mat-error>
</mat-form-field>
</form>
下面是ts文件
submitted = false;
public emailForm: FormGroup;
suggestedEmail: string;
email = new FormControl();
confirm = new FormControl();
constructor(private fb: FormBuilder) {
super();
this.emailForm = this.fb.group({
userData: this.fb.group({
email: [null, [Validators.required, Validators.email]],
confirm: [null, [Validators.required, Validators.email]],
}, {
validator: (form: FormGroup) => { return form.get('email').value !== form.get('confirm').value ? { emailMismatch: true } : null }
})
});
}
我面临的错误是
ERROR Error: Cannot find control with name: 'confirm'
at _throwError (forms.js:2094)
at setUpControl (forms.js:2002)
at FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective.addControl (forms.js:5168)
at FormControlName.push../node_modules/@angular/forms/fesm5/forms.js.FormControlName._setUpControl (forms.js:5769)
at FormControlName.push../node_modules/@angular/forms/fesm5/forms.js.FormControlName.ngOnChanges (forms.js:5690)
at checkAndUpdateDirectiveInline (core.js:20661)
at checkAndUpdateNodeInline (core.js:21929)
at checkAndUpdateNode (core.js:21891)
at debugCheckAndUpdateNode (core.js:22525)
at debugCheckDirectivesFn (core.js:22485)
解决方案
您已从您的组中排除confirm
了 formcontrol userData
,因此错误,它应该在该 formgroup 内,因为您已将其标记为这样,所以......
<div formGroupName="userData">
<input matInput formControlName="email" />
<input matInput formControlName="confirm" />
</div>
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