找不到 Angular 转换管道

Question

我有一个使用 translateService 的组件，但无法使用组件模板 HTML 上的管道翻译项目，我收到以下错误:

The pipe 'translate' could not be found

应用程序模块.ts

import {BrowserModule} from "@angular/platform-browser";
import {NgModule} from "@angular/core";
import {HttpModule, Http} from "@angular/http";
import {TranslateModule, TranslateLoader, TranslateStaticLoader} from 'ng2-translate';
import {AppComponent} from "./app.component";

@NgModule({
declarations: [AppComponent],
imports: [
BrowserModule,
HttpModule,
TranslateModule.forRoot({
    provide: TranslateLoader,
    useFactory: (http: Http) => new TranslateStaticLoader(http, './assets/i18n', '.json'),
    deps: [Http]
   })
],
bootstrap: [AppComponent]
})
export class AppModule {
}

booking.component.ts

import {Component, OnInit} from '@angular/core';
import {BookingComponent} from './booking.component';
import {TranslateService} from 'ng2-translate';

@Component({
   selector: 'app-booking',
   templateUrl: './booking.component.html',
   styleUrls: ['./booking.component.css']
})

export class BookingComponent implements OnInit {
  constructor(private translate: TranslateService
  ) {
    translate.setDefaultLang('de');
    translate.use('de');
};

ngOnInit() {
}
}

booking.component.html

<p>{{'TESTKEY' | translate }}</p>

组件上服务的翻译工作正常，但我还需要用管道翻译 html

Answer 1

您需要imports: [ TranslateModule ] 到 BookingComponent 声明的任何模块中。app 模块中的导入仅使管道可用于在该模块中声明的组件模块。但是提供者/服务是从模块全局注册的(不像组件、指令和管道)