Unable to inject dependency on Application

[AntonyZ89]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Created a provider called "EventManager" and tried inject it on Application class to be invoked on postServerInitialization()

But received this error on start the server:

Steps to reproduce

1. npm ci
2. npm run dev

Expected behavior

Package version

1.5.1

Node.js version

18.14.0

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

di-issue.zip

[AntonyZ89]

After read the doc of Inversify I solved this problem doing the following changes:

application.provider.ts

const appInstance = new App();

export { appInstance as App };

to

export { App };

--

src/main.ts

const app = App.create(container);

to

const app = container.get(App);

app.create(container);

And it's works as expected:

Opened this issue because I believe it is a problem in the template as it does not accept injecting dependency into the Application class.

[rsaz]

Hi @AntonyZ89 to resolve this issue in the proper manner I would recommend you to do this instead:

@provide(TwitchProvider)
class TwitchProvider {
    async getAuthProvider(): Promise<string> {
        return randomUUID();
    }
}

export { TwitchProvider };

Use the container to request services, instances like the code below:

@provide(App)
class App extends Application {
    private twitchProvider: TwitchProvider;

    constructor() {
        super();
        this.twitchProvider = container.get<TwitchProvider>(TwitchProvider);
    }

    protected configureServices(): void {
        Environments.checkAll();
    }

    // eslint-disable-next-line @typescript-eslint/no-empty-function
    protected postServerInitialization(): void {
        console.log(this.twitchProvider.getAuthProvider());
    }

    protected serverShutdown(): void {
        log(LogLevel.Info, "Server is shutting down", "logger-provider");
        super.serverShutdown();
    }
}

const appInstance = new App();

export { appInstance as App };

This is a very similar approach to .NET core on requesting services from the DI system, and how we are using at the moment on ExpressoTS

serviceProvider.GetRequiredService<SERVICES.Core.IAuthService>();

Let me know if it is working fine for you, so that I can close this ticket.

[AntonyZ89]

@rsaz Thanks, it works!