angular - 在输入属性中使用管道

Question

我正在使用一个 UI 框架:SmartAdmin

这为 i18n 提供了国际化功能

我正尝试在这个 Boostrap 验证模块中使用它。

如果我放这个，它就可以工作了:

 <input type="text" class="form-control" name="firstname" data-bv-notempty="true" 
 data-bv-notempty-message="The first name is required and cannot be empty"
 data-bv-stringlength-max="50" data-bv-stringlength-message="The first name must be less than 50 characters long"/>

但是我尝试使用管道:

<input type="text" class="form-control" name="firstname" data-bv-notempty="true" 
data-bv-notempty-message="{{'The first name is required and cannot be empty' | i18n}}"
data-bv-stringlength-max="50" data-bv-stringlength-message="The first name must be less than 50 characters long" />

我收到这个错误:

Can't bind to 'data-bv-notempty-message' since it isn't a known property of 'input'. ("ut type="text" class="form-control" name="firstname" data-bv-notempty="true" [ERROR ->][data-bv-notempty-message]="'The first name is required' | i18n" data-bv-stri"): ng:///UserModule/UserAccountComponent.html@66:22

问题:如何在输入属性中使用管道？

编辑:添加代码管道:

import { Pipe, PipeTransform } from '@angular/core';
import {I18nService} from "./i18n.service";

@Pipe({
  name: 'i18n',
  pure: false
})
export class I18nPipe implements PipeTransform {

  constructor(public i18nService: I18nService){}

  transform(phrase: any, args?: any): any {
    //console.log(phrase)
    return this.i18nService.getTranslation(phrase);
  }

}

方法:getTranslation()

public getTranslation(phrase:string):string {
    return this.data && this.data[phrase] ? this.data[phrase] : phrase;
}

Answer 1

它会抛出错误，因为 Angular 不理解该属性名称。为了允许自定义属性在 Angular 上下文之外工作，您可以考虑添加 CUSTOM_ELEMENTS_SCHEMA 元素，这将是 HTML 上的任何其他自定义属性。

import { CommonModule } from '@angular/common';

@NgModule({
  declarations: [ ... ],
  exports: [ ... ],
  imports: [ ... ],
  schemas: [ CUSTOM_ELEMENTS_SCHEMA ]
})
export class AppModule {}

---

您还可以使用属性绑定(bind)，例如 [attr.something]="value"

[attr.data-bv-notempty-message]="'The first name is required and cannot be empty' | i18n"