How to get the app instance within the controller?

Question

I started using Loopback4 on a small app I am making.

The app is periodically retrieving data from an external site and the data is stored in a variable in the app object.

Now I'm a bit stuck as I don't know how to get the app instance within the controller. Do I inject it? Please help.

Answer 1

You can inject the application object using the binding key CoreBindings.APPLICATION_INSTANCE.

import {CoreBindings, inject} from '@loopback/core';
import {MyApplication} from '../application';

export class MyController {
  constructor(
    @inject(CoreBindings.APPLICATION_INSTANCE)
    private app: MyApplication,
  ) {}

  // ...
}

Documentation: https://loopback.io/doc/en/lb4/apidocs.core.corebindings.application_instance.html