Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Interface and Implementation Inject Issue

See original GitHub issue

Thank you for making this wonderful library! But, I have some issue with your lib… There is an example.

Interface

export interface InterfaceClass {
  helloWorld(): string;
}

Implementation

import {InterfaceClass} from "./InterfaceClass";
import {Service} from "typedi";

@Service('helloworld')
export class InterfaceClassImpl implements InterfaceClass {
  helloWorld(): string {
    return 'Hello World!';
  }

}

And I got error with this code

Test code

import 'reflect-metadata'
import 'mocha';
import {Container} from "typedi";
import {InterfaceClass} from "./InterfaceClass";
import {InterfaceClassImpl} from "./InterfaceClassImpl";

describe('Inject test', () => {
  it('We cannot DI', () => {
    let interfaceClass: InterfaceClass = Container.get('helloworld');
    console.log(interfaceClass.helloWorld())
  });
});

Error code

ServiceNotFoundError: Service "helloworld" was not found, looks like it was not registered in the container. Register it by calling Container.set("helloworld", ...) before using service.
    at new ServiceNotFoundError (src/error/ServiceNotFoundError.ts:11:9)
    at ContainerInstance.getServiceValue (src/ContainerInstance.ts:277:19)
    at ContainerInstance.get (src/ContainerInstance.ts:119:21)
    at Function.Container.get (src/Container.ts:107:36)
    at Context.it (source/InjectTest.ts:11:52)

But weirdly, I can succes when I append Container.get(InterfaceClassImpl);

Success Test Code

describe('Inject test', () => {
  it('We can DI', () => {
    Container.get(InterfaceClassImpl);
    let interfaceClass: InterfaceClass = Container.get('helloworld');
    console.log(interfaceClass.helloWorld())
  });
  it('We can DI too', () => {
    new InterfaceClassImpl();
    let interfaceClass: InterfaceClass = Container.get('helloworld');
    console.log(interfaceClass.helloWorld())
  });
});

Container.get seems to call new… I means, if we don’t new, we cannot register service. What is the right way to do?