如何在不使用对象模型的情况下将Nestjs应用程序连接到postgreSQL？

npm install --save @nestjs/typeorm pg

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'postgres',
      host: 'localhost',
      port: 5432,
      username: 'your_username',
      password: 'your_password',
      database: 'your_database',
      entities: [],
      synchronize: true,
    }),
  ],
})
export class DatabaseModule {}

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { DatabaseModule } from './database.module';

@Module({
  imports: [DatabaseModule],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserService {
  constructor(
    @InjectRepository(User)
    private userRepository: Repository<User>,
  ) {}

  async findAll(): Promise<User[]> {
    return this.userRepository.find();
  }
}