我面临着奇怪的问题, Container.get(MyServiceName);返回所需的服务,但是用@Inject()装饰的类属性未定义。
我尝试用@Service()装饰类
我确实在应用程序的入口点导入了反射元数据 导入“ reflect-metadata”;
我想知道是否可能与事实有关,我不是直接从我的node_modules中而是从我的依赖中使用typedi?
应用程序既不使用Express框架,也不使用路由控制器
我的tsconfig.json:
"compilerOptions": {
"declaration": true,
"pretty": true,
"esModuleInterop": true,
"target": "esnext",
"noImplicitAny": true,
"noImplicitReturns": true,
"noUnusedLocals": false,
"moduleResolution": "node",
"noUnusedParameters": true,
"strictPropertyInitialization": false,
"module": "commonjs",
"lib": ["dom", "es2018"],
"importHelpers": true,
"outDir": "./dist",
"strict": true,
"typeRoots": ["node_modules/@types"],
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"sourceMap": true
},
"include": ["./src/**/*"],
"exclude": ["node_modules", "./dist/**/*"]
}
我想注入的服务
import MyServiceName from '../services/MyServiceName';
import { Container, Inject, Service } from 'my_dependency/lib';
export default class SomeClass{
@Inject()
private readonly someService: MyServiceName;
public async someMethod(): SomeResponseType {
const thatWorks = Container.get<MyServiceName>(MyServiceName);
console.log(this.someService); // undefined
console.log(thatWorks); // proper class
}
}
我要注入的服务
@Service()
export default class MyServiceName {
public async someMethod(): SomeReturnType {
return someReturnedData;
}
}
我想通过@Inject()装饰器注入依赖项
答案 0 :(得分:0)
您需要使用SomeClass
创建Container#get
的实例,否则容器将无法注入该属性。
这对我有用:
// a.ts
import { Service } from "typedi";
@Service()
export class Foo {
foo() {
return 10;
}
}
// b.ts
import { Foo } from "./a";
import { Inject } from "typedi";
export class Bar {
@Inject() private readonly service: Foo
foo() {
console.log(this.service);
}
}
// test.ts
import "reflect-metadata";
import { Bar } from "./b";
import { Container } from "typedi";
const noFoo = new Bar();
noFoo.foo(); // yields undefined
const withFoo = Container.get<Bar>(Bar);
withFoo.foo(); // yields Foo