Feature Modules

Put everything about one feature in its own folder and module. This keeps the code easy to find and lets teams work in parallel.

src/
├── app.module.ts
├── products/
│   ├── dto/
│   │   ├── create-product.dto.ts
│   │   └── update-product.dto.ts
│   ├── entities/product.entity.ts
│   ├── products.controller.ts
│   ├── products.service.ts
│   └── products.module.ts
├── orders/
│   ├── orders.controller.ts
│   ├── orders.service.ts
│   └── orders.module.ts
└── users/
    └── ...

src/products/products.module.ts

import { Module } from '@nestjs/common';
import { ProductsController } from './products.controller';
import { ProductsService } from './products.service';

@Module({
  controllers: [ProductsController],
  providers: [ProductsService],
  exports: [ProductsService],      // OrdersModule needs it to check stock
})
export class ProductsModule {}

src/app.module.ts

import { Module } from '@nestjs/common';
import { ProductsModule } from './products/products.module';
import { OrdersModule } from './orders/orders.module';

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