[英]How to implement a custom date validation for Out of Stock days
I am trying to implement a custom date validator where I can check if the date entered is not in a list of invalid dates (array of custom dates, ex: ['08/20', '08/24', '08/31']
) (Out of Stock) using Angular reactive forms. 我正在尝试实现一个自定义日期验证器,我可以在其中检查输入的日期是否不在无效日期列表中(自定义日期的数组,例如:
['08/20', '08/24', '08/31']
)(缺货),使用Angular反应形式。
My validator looks like this: 我的验证器如下所示:
export function OutOfStockValidator(invalidDates: any): ValidatorFn {
return (control: AbstractControl): { [key: string]: boolean } | null => {
if (!invalidDates) { return null; }
let isInvalid = false;
for (const i in invalidDates) {
const d = moment(control.value).format('MM' ) + '/' + moment(control.value).format('DD');
if (d == invalidDates[i]) { isInvalid = true; }
}
return isInvalid ? { outOfStock: true } : null;
};
}
This is how the definition of the control looks like: 控件的定义如下所示:
this.form = this._formBuilder.group({
installDate: new FormControl(null, [Validators.required, OutOfStockValidator(this._order.InvalidDates['CARPET_AM'])]),
...
});
Here is my template: 这是我的模板:
<div class="form-group">
<div class="row">
<label [for]="installDate" class="col-md-12 col-form-label font-weight-bold">Install Date</label>
<div class="col-md-12">
<kendo-datepicker #installDate formControlName="installDate" placeholder="" class="form-control col-md-6" [min]="today">
<ng-template kendoCalendarMonthCellTemplate let-date>
<span [ngClass]="isInvalidDate(date)">{{date.getDate()}}</span>
</ng-template>
</kendo-datepicker>
</div>
</div>
<div *ngIf="submitted && f.installDate.outOfStock" class="invalid-feedback d-block">
<p>Selected date is not available for selection</p>
</div>
</div>
The widget works good, but I can not display my custom message: Selected date is not available for selection. 该小部件工作正常,但我无法显示自定义消息:所选日期不可选择。
Any idea? 任何想法? Thanks!
谢谢!
The problem is that you are not checking the error properly in the *ngIf
. 问题是您没有在
*ngIf
正确检查错误。
This *ngIf="submitted && f.get('installDate').errors?.outOfStock"
should have the desired effect. *ngIf="submitted && f.get('installDate').errors?.outOfStock"
应该具有预期的效果。
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