injectable

问题 I am working on angular2 I have created service and inject those service using @Inject in component. I am confuse with the use of @Injectable() in service itself and what diff it makes. 回答1: @Inject() is a manual mechanism for letting Angular 2 know that a parameter needs to be injected @Injectable() lets Angular 2 know that a class can be used with the dependency injector. @Injectable() is not strictly required if the class has other Angular 2 decorators on it. What is important is that any

问题 I am working on angular2 I have created service and inject those service using @Inject in component. I am confuse with the use of @Injectable() in service itself and what diff it makes. 回答1: @Inject() is a manual mechanism for letting Angular 2 know that a parameter needs to be injected @Injectable() lets Angular 2 know that a class can be used with the dependency injector. @Injectable() is not strictly required if the class has other Angular 2 decorators on it. What is important is that any

问题 I am working on angular2 I have created service and inject those service using @Inject in component. I am confuse with the use of @Injectable() in service itself and what diff it makes. 回答1: @Inject() is a manual mechanism for letting Angular 2 know that a parameter needs to be injected @Injectable() lets Angular 2 know that a class can be used with the dependency injector. @Injectable() is not strictly required if the class has other Angular 2 decorators on it. What is important is that any

问题 im using injectable and get_it package in flutter i have a shared preference class : @LazySingleton() class SharedPref { final String _token = 'token'; SharedPreferences _pref; SharedPref(this._pref); Future<String> getToken() async { return _pref.getString(_token) ?? ''; } Future<void> setToken(String token) async { await _pref.setString(_token, token); } } this class inject as LazySingleton and i have a module for inject the shared preference : @module abstract class InjectableModule {

问题 Is it possible to do something like this? (cause I tried, and haven't succeed): @Injectable() class A { constructor(private http: Http){ // <-- Injection in root class } foo(){ this.http.get()... }; } @Injectable() class B extends A{ bar() { this.foo(); } } 回答1: Kind of - you have to make a super call to the constructor of your base class. Just pass down the needed dependencies: @Injectable() class A { constructor(private http: Http){ // <-- Injection in root class } foo(){ this.http.get()...

问题 I have a problem trying to unit test an angular service. I want to verify that this service is properly calling another service that is injected into it. Lets say I have this ServiceToTest that injects ServiceInjected: ServiceToTest .service.ts @Injectable() export class ServiceToTest { constructor(private _si: ServiceInjected) {} public init() { this._si.configure(); } } ServiceInjected.service.ts @Injectable() export class ServiceInjected { constructor() {} public configure() { /*Some

问题 I have an Angular2 app with a service that is used for getting a data from an API. Following this example, I want to create a separate file which should contain some configuration data. My problem is that my service has an @Injectable() decorator and I'm not sure if I can pass it a provide array in the metadata in which I will inject the configuration as shown in the tutorial. Anybody ever faced such a problem is welcome to share his solution :) 回答1: In fact, Angular2 leverages hierarchical

问题 Assume you divide up your systems in Value objects and Services objects (as suggested in "Growing Object-Oriented Software, Guided by Tests". Misko Hevery calls these "newables" and "injectables". What happens when one of your value objects suddenly needs to access a service to implement it's methods? Let's say you have a nice simple Value object. It's immutable, holds a few bits of information and that's about it. Let's say we use it something like this: CreditCard card = new CreditCard(

问题 Hi everyone, i'm new with Angular and I am having troubles with Injectable classes. I have an abstract class (on web.ts) which one of its protected attributes is an HttpClient object. The definition of this abstract class is as follows: import { HttpClient } from "@angular/common/http"; export abstract class Web { protected baseURL: string; constructor(baseURL: string, protected http: HttpClient) { this.baseURL = baseURL; } public abstract RetrieveData(pattern: string); } Then I have another

问题 I am trying to use an Injectable in my code in an Ionic 2 app and I get this error. Module build failed: SyntaxError: /home.js: Unexpected token (10:25) export class HomePage { constructor(myservice: WpService) { ^ this.service = myservice; this.data = null; } This is my code: (home.js file). import {Page} from 'ionic-framework/ionic'; import {WpService} from './wpservice'; @Page({ templateUrl: 'build/pages/home/home.html', providers: [WpService] }) export class HomePage { constructor