有没有办法从NestJS中的模块文件访问数据库？

npm install typeorm mysql

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

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'mysql',
      host: 'localhost',
      port: 3306,
      username: 'your_username',
      password: 'your_password',
      database: 'your_database',
      entities: [__dirname + '/**/*.entity{.ts,.js}'],
      synchronize: true,
    }),
  ],
})
export class DatabaseModule {}

import { Entity, Column, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
export class User {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @Column()
  email: string;
}

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();
  }

  async findOne(id: number): Promise<User> {
    return this.userRepository.findOne(id);
  }

  async create(user: User): Promise<User> {
    return this.userRepository.save(user);
  }

  async update(id: number, user: User): Promise<User> {
    await this.userRepository.update(id, user);
    return this.userRepository.findOne(id);
  }

  async remove(id: number): Promise<void> {
    await this.userRepository.delete(id);
  }
}

import { Module } from '@nestjs/common';
import { DatabaseModule } from './database.module';
import { UserService } from './user.service';

@Module({
  imports: [DatabaseModule],
  providers: [UserService],
})
export class UserModule {}

import { Module } from '@nestjs/common';
import { UserModule } from './user.module';

@Module({
  imports: [UserModule],
})
export class AppModule {}