Implementación del Patrón Repository en NestJS con TypeORM

// src/products/services/products.service.ts

import { InjectRepository } from '@nestjs/typeorm'; // 👈 import
import { Repository } from 'typeorm'; // 👈 import

import { Product } from './../entities/product.entity'; // 👈 entity
import { CreateProductDto, UpdateProductDto } from './../dtos/products.dtos';

@Injectable()
export class ProductsService {
  constructor(
    @InjectRepository(Product) private productRepo: Repository, // 👈 Inject
  ) {}

  findAll() {
    return this.productRepo.find();  // 👈 use repo
  }

  findOne(id: number) {
    const product = this.productRepo.findOne(id);  // 👈 use repo
    if (!product) {
      throw new NotFoundException(`Product #${id} not found`);
    }
    return product;
  }
  ...
}

// src/users/services/users.service.ts

  async getOrderByUser(id: number) {
    const user = this.findOne(id);
    return {
      date: new Date(),
      user,
      products: await this.productsService.findAll(),
    };
  }

// src/database/database.module.ts

@Global()
@Module({
  imports: [
    TypeOrmModule.forRootAsync({
      inject: [config.KEY],
      useFactory: (configService: ConfigType<typeof config>) => {
        const { user, host, dbName, password, port } = configService.postgres;
        return {
          type: 'postgres',
          host,
          port,
          username: user,
          password,
          database: dbName,
          synchronize: true, // 👈 new attr
          autoLoadEntities: true, // 👈 new attr
        };
      },
    }),
  ],
  ...
})
export class DatabaseModule {}