NestJs in node REPL

nest-node-repl.js

// For this trick you'll need:
//  
//   $ node --experimental-repl-await
//
// If you happen to use Typescript alias paths, you'll also want to install `tsconfig-paths`
// and actually run the node REPL with:
//
//   $ TS_NODE_PROJECT=path/to/tsconfig.json node -r tsconfig-paths/register --experimental-repl-await
//
// All the statements need to be input inside REPL.


let { NestFactory } = require('@nestjs/core')

// importing whole app module
let { AppModule } = require('./dist/src/app.module')

// instantiating whole app (module)
appModule = await NestFactory.create(AppModule);

// extracting particular services
someService = appModule.get('SomeService');


// If you want to use single services which have other dependencies, you will need
// to import a *service* (not a module) and inject the dependencies yourself.
let { MyServiceWhichNeedsHttpService } = require('./dist/src/something')

let { HttpModule } = require('@nestjs/common')
httpModule = await NestFactory.create(HttpModule);
httpService = httpModule.get('HttpService');

myService = new MyServiceWhichNeedsHttpService(httpService);