如何在服务层的 Formly 表单中格式化 Angular Material 日期选择器(不是显示格式) [英] How to format Angular Material date-picker inside Formly form for service layer (not display format)

问题描述

我想在 Angular Material 日期选择器上将我的日期值公开为仅日期(yyyy-MM-dd").目前，默认日期值为 ISO 格式(包括时间).

I would like to expose my date value as date only ("yyyy-MM-dd") on an Angular Material date picker. Currently, the default date value is an ISO format (includes time).

我有一个初学者Stackblitz 项目与所需的设置.formly-datepicker.type 是我想要集中转换的地方，以便模型中使用的任何日期都可以为服务层正确格式化.

I have a starter Stackblitz project with the the required setup. The formly-datepicker.type is where I would like to centralize the conversion so that any date used in the model will be formatted properly for the service layer.

我以集中方式完成它的尝试之一是使用 Angular ControlValueAccessor，但该值永远不会更新.ControlValueAccessor Stackblitz

One of my attempts to accomplish it in a centralized manner is using the Angular ControlValueAccessor, but the value is never updated. ControlValueAccessor Stackblitz

在示例 Stackblitz 中，更改日期并单击提交后，我需要返回的值类似于:{mydate":1940-03-11"}(没有时间信息).

In the example Stackblitz, after changing the date and clicking Submit the value I need returned would be something like: {"mydate":"1940-03-11"}(without the time information).

推荐答案

所以，我想我有解决方案可以让您将 mat datepicker 显示为 ("yyyy-MM-dd") 格式.安装到依赖项 "@angular/material-moment-adapter": "^11.1.2" 和 "moment": "^2.18.1"(都是当前版本).然后在您的 formly-datepicker-type.component.ts 文件中导入这两个库.

So , I think I have solution for you to display mat datepicker as ("yyyy-MM-dd") format. To do that Install to dependencies "@angular/material-moment-adapter": "^11.1.2" and "moment": "^2.18.1" (both are current version). Then import in your formly-datepicker-type.component.ts file these 2 libraries.

import {MomentDateAdapter} from '@angular/material-moment-adapter';
import {DateAdapter, MAT_DATE_FORMATS, MAT_DATE_LOCALE} from '@angular/material/core';

然后在您的 formly-datepicker-type.component.ts 文件中添加如下所示的日期格式.=>

Then add a date format like below in your formly-datepicker-type.component.ts file.=>

export const MY_FORMATS = {
  parse: {
    dateInput: 'LL',
  },
  display: {
    dateInput: 'YYYY-MM-DD',
    monthYearLabel: 'YYYY',
    dateA11yLabel: 'LL',
    monthYearA11yLabel: 'YYYY',
  },
};

之后更新 @Component，添加如下提供者 =>

After that Update @Component by adding providers like below =>

@Component({
  selector: "app-formly-datepicker-type",
  templateUrl: "./formly-datepicker-type.component.html",
  styleUrls: ["./formly-datepicker-type.component.css"],
   providers: [
    {provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE]},

    {provide: MAT_DATE_FORMATS, useValue: MY_FORMATS},
  ]
}) 

最后，日期时间将按需要显示.
注意: 我已经更新了 stackblitz 的示例代码.请查看我的演示链接 =>Stackblitz mat-datepicker 日期时间格式.

Finally, Date time will show as wanted.
Note: I have updated you sample code of stackblitz. Please check my demo link =>Stackblitz mat-datepicker Date-Time Format.

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