nestjs-patterns

name	nestjs-patterns
description	NestJS architecture patterns for modules, controllers, providers, DTO validation, guards, interceptors, config, and production-grade TypeScript backends.
origin	ECC

NestJS Development Patterns

Production-grade NestJS patterns for modular TypeScript backends.

When to Activate

• Building NestJS APIs or services
• Structuring modules, controllers, and providers
• Adding DTO validation, guards, interceptors, or exception filters
• Configuring enprojectnment-aware settings and database integrations
• Testing NestJS units or HTTP endpoints

Project Structure

src/
├── app.module.ts
├── main.ts
├── common/
│   ├── filters/
│   ├── guards/
│   ├── interceptors/
│   └── pipes/
├── config/
│   ├── configuration.ts
│   └── validation.ts
├── modules/
│   ├── auth/
│   │   ├── auth.controller.ts
│   │   ├── auth.module.ts
│   │   ├── auth.service.ts
│   │   ├── dto/
│   │   ├── guards/
│   │   └── strategies/
│   └── users/
│       ├── dto/
│       ├── entities/
│       ├── users.controller.ts
│       ├── users.module.ts
│       └── users.service.ts
└── prisma/ or database/

• Keep domain code inside feature modules.
• Put cross-cutting filters, decorators, guards, and interceptors in common/.
• Keep DTOs close to the module that owns them.

Bootstrap and Global Validation

async function bootstrap() {
  const app =  .(, { :  });

  app.(
     ({
      : ,
      : ,
      : ,
      : { :  },
    }),
  );

  app.( (app.()));
  app.( ());

   app.(process.. ?? );
}
();