角2自管

Question

起初：Angular2: custom pipe could not be found這並沒有幫助我在任何情況下.. 我有以下問題：

管：

import { Pipe, PipeTransform } from "@angular/core"; 
import { DecimalPipe} from "@angular/common"; 

@Pipe({ 
    name: "ToNumberPipe" 
}) 
export class ToNumberPipe extends DecimalPipe implements PipeTransform { 
    // this allows to pass strings in decimalpipes as well and do nothing if it NAN 
    public transform(value: string, args: string): any { 
     const retNumber = Number(value); 
     if (isNaN(retNumber)) { 
      return value; 
     } 
     return super.transform(value, args); 
    } 
} 

應用：模塊

@NgModule(
    { 
     // all components, pipes and directive which are using this module 
     declarations: [AppComponent, ... all Components go here], 
     // All modules like forms or http 
     imports: [...., MainPipeModule], 
     // all services and other providers 
     providers: [...all services go here], 
     bootstrap: [AppComponent] 
    } 
) 
export class AppModule { 
} 

管模塊

import { NgModule } from "@angular/core"; 
import {CommonModule} from "@angular/common"; 

import {ToNumberPipe} from "./shared/pipes/customNumber.pipe"; 
@NgModule(
    { 
     // all components, pipes and directive which are using this module 
     declarations: [ToNumberPipe], 
     imports: [CommonModule], 
     exports: [ToNumberPipe] 
    }) 
export class MainPipeModule { 
} 

HTML代碼

<span [ngClass]="getClass(rowValue)" class="badge isLink" (click)="selectTask(rowValue.taskId)">{{rowValue.value | ToNumberPipe : "1.0-4"}}</span> 

我試圖直接添加管道到app.module，但同樣的結果...

zone.js:1 Unhandled Promise rejection: Template parse errors: 
The pipe 'ToNumberPipe' could not be found 

我也試着刪除參數，並添加一個簡單的管還有......總是相同的錯誤

角2版本：2.2.4

Answer 1

你必須使用至少v2.3.0-rc.0

在這個版本以下特點包括：core: properly support inheritance

我猜你管被適當地包括等，但這些裝飾（例如：你的名字）沒有發佈正確..