Angular - 找不到带有名称的管道 [英] Angular - No pipe found with name

问题描述

我使用ng g pipe"命令创建了一个管道.在我的代码中使用它时出现控制台错误.下面附上代码的截图.错误:错误 NG8004:未找到名为filterByPrcName"的管道.filter-by-prc-name.pipe.ts控制台错误消息product-list.component.html

解决方案

你需要打开声明你的组件的 angular 模块，然后将其添加到声明中，并添加所需的导入.

示例:

 {{product.productCode |小写 |convertToSpaces: '-' }}</td>

<块引用>

src/app/products/product-list.component.html 中的错误:48:61 - 错误NG8004:未找到名称为convertToSpaces"的管道.

app.module.ts:

import { BrowserModule } from '@angular/platform-b​​rowser';从'@angular/core' 导入 { NgModule };从'@angular/forms'导入{FormsModule}；从 './app.component' 导入 { AppComponent };从'./products/product-list.component'导入{ProductListComponent}；import { ConvertToSpacesPipe } from './shared/convert-to-spaces.pipe';//<-- 添加这个@NgModule({声明: [应用组件，产品列表组件，ConvertToSpacesPipe//<-- 添加这个],进口:[浏览器模块，表单模块],引导程序:[AppComponent]，//导出:[AppComponent],})导出类 AppModule { }

convert-to-spaces.pipe.ts

import { Pipe, PipeTransform } from '@angular/core'@Pipe({ 名称:'convertToSpaces' })导出类 ConvertToSpacesPipe 实现 PipeTransform {变换(值:字符串，字符:字符串):字符串{return value.replace(character, ' ');}}

I've created a pipe using "ng g pipe" command. I'm getting a console error when I'm using it in my code. The screenshots of the code are attached below. Error: error NG8004: No pipe found with name 'filterByPrcName'. filter-by-prc-name.pipe.tsConsole Error Message product-list.component.html

解决方案

You need to open the angular module that declares your component, then add it to the declarations, and add the needed import.

Example:

 <td>{{product.productCode | lowercase | convertToSpaces: '-' }}</td>

ERROR in src/app/products/product-list.component.html:48:61 - error NG8004: No pipe found with name 'convertToSpaces'.

app.module.ts:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { FormsModule } from '@angular/forms';

import { AppComponent } from './app.component';
import { ProductListComponent } from './products/product-list.component';
import { ConvertToSpacesPipe } from './shared/convert-to-spaces.pipe'; // <-- Add this

@NgModule({
  declarations: [
    AppComponent,
    ProductListComponent,
    ConvertToSpacesPipe  // <-- Add this
  ],
  imports: [
    BrowserModule,
    FormsModule
  ],
  bootstrap: [AppComponent],

  //exports: [AppComponent],

})
export class AppModule { }

convert-to-spaces.pipe.ts

import { Pipe, PipeTransform } from '@angular/core'

@Pipe({ name: 'convertToSpaces' })

export class ConvertToSpacesPipe implements PipeTransform {

    transform(value: string, character: string): string {
        return value.replace(character, ' ');
    }

}

这篇关于Angular - 找不到带有名称的管道的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！