DI：class 的构造函数如何多次调用 injectable

Question

有几个类,怎么注入TermsExchangeService:

import {TermsExchangeService} from './terms-exchange.service';

@injectable()
export class TermsExchangeComponent {
  constructor(
        private termsExchangeService: TermsExchangeService
    ) {}
}

和

import {TermsExchangeService} from './terms-exchange.service';

@injectable()
export class PurchaseMainComponent {
    constructor(
       private termsExchangeService: TermsExchangeService
    ) {}

和服务如何在PurchaseMainComponent和TermsExchangeComponent

中使用

@injectable()
export class TermsExchangeService {

    constructor() {
        debugger; // call 2 times!!!
    }
}

我用autoBindInjectable:

var simpleContainer = new Container({ autoBindInjectable: true })

从 TermsExchangeService 的循环构造函数中获取组件时调用多次：

for (let item = 0; item < components.length; item++) {
   const container = simpleContainer.get(components[item]);
}

为什么在每个组件中创建对象？以及如何正常注射？

Answer 1

默认情况下 injectable 不是单例。

解决这个问题可以加上defaultScope: 'Singleton':

var simpleContainer = new Container(
            { 
               autoBindInjectable: true, 
               defaultScope: 'Singleton'
            }
)

DI：class 的构造函数如何多次调用 injectable

DI: constructor of class how injectable calls serveral times

typescript

inversifyjs