nestjsplaywithdynamicmodulesandlocalpackage's Introduction

README

project as a problem with Error: Cannot find module 'reflect-metadata' when launch consumer app....

a simple and naife example to pass a UserService to a DynamicModule (NestJs Library)........won't work this is one of the tries without sucess until find how to do it the "right way"

in th end the only thing that matters in this poc is the userService: new UsersService() and try to figure out a way to inject the userService, seems more idiomatic than create a instance of it in.....

@Module({
  imports: [
    UsersModule,
    AuthModule.register({
      // naife way to pass userService
      userService: new UsersService(),
      // config
      config: {
        folder: '../consumerapp/config'
      }
    })
  ],
  controllers: [AppController],
  providers: [AppService],
})

export class AppModule { }

Install dependecies

Error: Cannot find module 'reflect-metadata'
It's a peerDependency.
You need to install it alongside rxjs aswell.
npm install --save reflect-metadata rxjs

Build local unpublished package

$ cd nestjs-package-starter
$ npm i
$ npm run start:dev

Install Package in consumer app

to use local package nestjs-package-starter

$ cd consumerapp
$ npm i
# not need here only as a reference to how to import it into consumer app
$ npm i ../nestjs-package-starter

Start consumer app

$ cd nestjs-package-starter
$ npm run start:debug

Some Curls to test

$ curl 127.0.0.1:3000
{
  "message": "hello john"
}
$ curl 127.0.0.1:3000/config
{
  "HELLO_MESSAGE": "hello Hello there, world!"
}
# OK
$ curl -X POST 127.0.0.1:3000/auth/login \
  -H "Content-Type: application/json" \
  -d '{ "username": "john", "password": "changeme" }' \
  | jq
{
  "logged": true
}  
# KO
$ curl -X POST 127.0.0.1:3000/auth/login \
  -H "Content-Type: application/json" \
  -d '{ "username": "john", "password": "whatpass" }' \
  | jq
{
  "logged": false
}

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