Leverage pipes within Angular 2 rc.6 components

Before the rc.5, I used to initialize my custom pipe in the component like this:

private myCustomPipe = new CustomPipe()
this.myCustomPipe.transform(...)

However, after migrating the application, I encountered an error with the new CustomPipe() instantiation (I moved the injection from the component to the module's declarations).

In app.module.ts :

@NgModule({
    declarations: [CustomPipe],
    imports: [
        BrowserModule,
        FormsModule,
        HttpModule
    ],
    bootstrap: [AppComponent],
})
export class AppModule {}

Is there a way to achieve this in Rc.6?

Answer №1

Adding a custom pipe to your Angular application requires more than just declaring it in the view. If you want to use it in code, such as components or services, you need to add it to the providers array.

@NgModule({
    declarations: [CustomPipe], // declaration for view only
    providers: [CustomPipe], // provider for injection into components or services
    imports: [
        BrowserModule,
        FormsModule,
        HttpModule
    ],
    bootstrap: [AppComponent],
})
export class AppModule {}

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