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title, impact, impactDescription, tags
| title | impact | impactDescription | tags |
|---|---|---|---|
| Organize by Feature Modules | CRITICAL | 3-5x faster onboarding and development | architecture, modules, organization |
Organize by Feature Modules
Organize your application into feature modules that encapsulate related functionality. Each feature module should be self-contained with its own controllers, services, entities, and DTOs. Avoid organizing by technical layer (all controllers together, all services together). This enables 3-5x faster onboarding and feature development.
Incorrect (technical layer organization):
// Technical layer organization (anti-pattern)
src/
├── controllers/
│ ├── users.controller.ts
│ ├── orders.controller.ts
│ └── products.controller.ts
├── services/
│ ├── users.service.ts
│ ├── orders.service.ts
│ └── products.service.ts
├── entities/
│ ├── user.entity.ts
│ ├── order.entity.ts
│ └── product.entity.ts
└── app.module.ts // Imports everything directly
Correct (feature module organization):
// Feature module organization
src/
├── users/
│ ├── dto/
│ │ ├── create-user.dto.ts
│ │ └── update-user.dto.ts
│ ├── entities/
│ │ └── user.entity.ts
│ ├── users.controller.ts
│ ├── users.service.ts
│ ├── users.repository.ts
│ └── users.module.ts
├── orders/
│ ├── dto/
│ ├── entities/
│ ├── orders.controller.ts
│ ├── orders.service.ts
│ └── orders.module.ts
├── shared/
│ ├── guards/
│ ├── interceptors/
│ ├── filters/
│ └── shared.module.ts
└── app.module.ts
// users.module.ts
@Module({
imports: [TypeOrmModule.forFeature([User])],
controllers: [UsersController],
providers: [UsersService, UsersRepository],
exports: [UsersService], // Only export what others need
})
export class UsersModule {}
// app.module.ts
@Module({
imports: [
ConfigModule.forRoot(),
TypeOrmModule.forRoot(),
UsersModule,
OrdersModule,
SharedModule,
],
})
export class AppModule {}
Reference: NestJS Modules