TypeError: rxjs_1.lastValueFrom is not a function - postgresql

Question

I am building an api using nestjs. After adding the typeorm and pg dependencies and adding the TypeOrmModule.forRoot({}) code in app.module.ts like shown below.
import { Module } from '#nestjs/common';
import { TypeOrmModule } from '#nestjs/typeorm';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { CoffeesModule } from './coffees/coffees.module';
#Module({
imports: [CoffeesModule, TypeOrmModule.forRoot({
type: 'postgres',
host: 'localhost',
port: 5432,
username: 'postgres',
password: 'xxx',
database: 'postgres',
autoLoadEntities: true,
synchronize: true
})],
controllers: [AppController],
providers: [AppService],
})
export class AppModule { }
I get an error TypeError: rxjs_1.lastValueFrom is not a function with but no error when I exclude TypeOrmModule.forRoot({}).
What could be the reason for the error ?

Answer 1

If you're using Nest v8, RxJS version 7 is used, which no longer has a toPromise() method for Observables, so Nest uses the lastValueFrom method instead. If you're receiving this error, you probably need to update your rxjs dependency to >7.
npm i rxjs#^7
yarn add rxjs#^7
pnpm i rxjs #^7
Pick your flavor of package manager and have at it.
In the last update of NestJS, when is used cli to initialization of project this error is throw.

Answer 2

The real answer
The issue is conflict with nest version.. anyone who see this - just make sure all your nestJs packages are of version 7 or 8 - don't mix them. especially those:
#nestjs/common
#nestjs/core
#nestjs/typeorm
from here: https://github.com/nestjs/nest/issues/7468#issuecomment-876174870

Answer 3

update "#nestjs/typeorm": "^7.1.5" in package.json and enter npm i and restart server