最近我在ionic4名称中创建了自己的管道是StatusairportPipe
。然后我在app module.ts
中导入它,现在当我尝试使用它时出现错误:
ERROR Error: Uncaught (in promise): Error: Template parse errors:
The pipe 'my' could not be found ("
<td text-center>{{item?.flight.aircraft.model.code}}</td>
<td text-right>{{[ERROR ->]item?.flight.status.generic.status.text | my}}</td>
</tr>
StatusairportPipe
模型ts
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'my'
})
export class StatusairportPipe implements PipeTransform {
public states: Object = {
'scheduled': 'مجدولة',
};
transform(value: string, ...args) {
// This is our catch for data that hasn't interpolated
// from its source yet, a basic async fix.
if(value == null) return;
// Otherwise, lookup the state name from the acronym
if(this.states[value]){
return this.states[value];
} else {
return value;
}
}
}
app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';
import { IonicModule, IonicRouteStrategy } from '@ionic/angular';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';
import { StatusBar } from '@ionic-native/status-bar/ngx';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HTTP } from '@ionic-native/http/ngx';
import { Network } from '@ionic-native/network/ngx';
import { StatusairportPipe } from './statusairport.pipe';
@NgModule({
declarations:
[AppComponent,
StatusairportPipe
],
entryComponents: [],
imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule],
exports:[
StatusairportPipe,
AliPipe
],
providers: [
StatusBar,
SplashScreen,
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
HTTP,
Network
],
bootstrap: [AppComponent]
})
export class AppModule {}
我已经遇到了这个问题,我刚刚在模块导出上添加了管道来解决问题。
试试这个:
@NgModule({
declarations:
[AppComponent,
StatusairportPipe
],
entryComponents: [],
imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule],
providers: [
StatusBar,
SplashScreen,
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
HTTP,
Network
],
bootstrap: [AppComponent],
exports: [ StatusairportPipe]
})
export class AppModule {}
如果有效,请告诉我。祝好运。
我修好了当我在ionic 4
中创建自己的管道时,您只需要将它已经创建的管道添加到您想要使用的页面模块中。你不需要在app.module中添加
我希望它会帮助别人。
1)首先,在src / app文件夹中创建管道文件夹(在app文件夹中)。
2)其次,在cmd“离子生成管道/ searchfilter”=>这将在管道中生成两个文件。
3第三,在名为“pipes.module.ts”的pipes文件夹中创建文件,并将下面的代码写入=>“pipes.module.ts”
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SearchfilterPipe } from './searchfilter.pipe'; //our pipe which we generate
@NgModule({
imports: [
CommonModule
],
declarations: [SearchfilterPipe],
exports: [SearchfilterPipe]
})
export class PipesModule { }
现在我们有了PipesModule,我们可以生成更多管道并将它们写入pipesmodule。我们只导入PipesModule而不是所有管道。
4)您不必在app.module.ts中导入PipesModule
5)现在转到要使用管道的页面并打开例如“anasayfa.module.ts”并导入“PipesModule”并将其写入@ngModel导入(它将自动创建)请注意将PipesModule导入到something.MODULE.TS不是something.page.ts