我在FormGroup中有一个DatePicker,并尝试使用CustomDateAdapter解析日期,然后使用自定义表单验证功能对其进行验证。
我在DatePicker中输入错误字符串,该值进入CustomDateAdapter的parse()方法,但是在此值未进入自定义表单验证功能后,我看到myForm.get('validFrom') .invalid是 false 和 value (在 NULL 中)。但是在DatePicker中,我仍然看到错误字符串。
所以我的错误字符串出现在CustomDateAdapter的parse()上,但是没有出现在验证功能上。
component.ts:
const initialValue = { value: null, disabled: true };
this.myForm = this.formBuilder.group({
id: null,
name: initialValue,
email: [initialValue, [Validators.email]],
validity: this.formBuilder.group({
validFrom: [initialValue, [CustomValidators.dateValidator]],
validTo: [initialValue, [CustomValidators.dateValidator]],
}, { validator: CustomValidators.dateDifferenceValidators('validFrom', 'validTo') })
});
component.html:
<mat-card>
<mat-card-content>
<form [formGroup]="myForm">
<mat-form-field >
<input
matInput
formControlName="name"
[placeholder]="name"
required
>
<mat-error *ngIf="myForm.get('name').invalid">
Error in name
</mat-error>
</mat-form-field>
<mat-form-field>
<input
matInput
formControlName="email"
[placeholder]="email"
>
<mat-error *ngIf="myForm.get('email').invalid">
Error in email
</mat-error>
</mat-form-field>
<div formGroupName="validity">
<mat-form-field>
<input
matInput
[matDatepicker]="fromPicker"
formControlName="validFrom"
[placeholder]="date">
<mat-datepicker-toggle
matSuffix
[for]="fromPicker"
></mat-datepicker-toggle>
<mat-datepicker #fromPicker></mat-datepicker>
<mat-error *ngIf="siteForm.get('validity.validFrom').invalid">
Error in dateFrom
</mat-error>
</mat-form-field>
<mat-form-field>
<input
matInput
[matDatepicker]="toPicker"
formControlName="validTo"
[placeholder]="date"
>
<mat-datepicker-toggle
matSuffix
[for]="toPicker"
></mat-datepicker-toggle>
<mat-datepicker #toPicker></mat-datepicker>
<mat-error *ngIf="siteForm.get('validity.validTo').invalid">
Error in dateTo
</mat-error>
</mat-form-field>
<div *ngIf="siteForm.hasError('dateDifference', 'validity')">
Dates are not valid
</div>
</div>
</form>
</mat-card-content>
</mat-card>
CustomDateAdapter.ts:
import { MomentDateAdapter } from '@angular/material-moment-adapter';
import { MAT_DATE_LOCALE } from '@angular/material/core';
import { Inject, Injectable, Optional } from '@angular/core';
import * as moment from 'moment';
@Injectable()
export class CustomDateAdapter extends MomentDateAdapter {
constructor(@Optional() @Inject(MAT_DATE_LOCALE) dateLocale: string) {
super(dateLocale);
}
parse(value, parseFormat) {
if (value && typeof value === 'string') {
return moment.isMoment(value) && moment(value).isValid() ? moment(value, parseFormat) : null;
}
if (value && moment.isMoment(value)) {
return moment(value, parseFormat).isValid() ? moment(value, parseFormat) : null;
}
if (value && moment.isDate(value) && !isNaN(value.valueOf())) {
return moment(value, parseFormat);
}
return value ? moment(value).locale(this.locale) : null;
}
}
dateValidator():
export function dateValidator(control: AbstractControl): ValidationErrors {
const currentDate = control.value;
if (!currentDate) {
return null;
}
if (moment.isMoment(currentDate) && moment(currentDate, 'D.M.YYYY').isValid()) {
return null;
}
if (moment.isDate(currentDate) && !isNaN(currentDate.valueOf())) {
return null;
}
return { 'invalidDate': { value: control.value } };
}
请帮助我了解问题及其解决方法。