nestjs

NestJS module architecture best practices involve organizing backend code into cohesive modules that group related controllers and services, ensuring clear separation of concerns and maintainability across the application's domain boundaries.

Structure NestJS controllers and services by assigning controllers the responsibility of handling HTTP requests, while delegating all business logic processing to dedicated service classes to maintain clean separation of concerns.

Implement validation and access control in NestJS by applying robust input validation mechanisms to incoming data payloads and using guards to enforce authentication and authorization rules before reaching the route handlers.

NestJS works with both TypeORM and Prisma for database integration, offering established conventions and patterns to seamlessly connect your services to relational databases using either of these preferred Object-Relational Mapping tools.

Set up Jest testing strategies for a NestJS backend by following structured approaches for both unit and integration testing, ensuring your controllers and services are properly mocked and validated against expected business logic outcomes.

Common NestJS pitfalls to avoid include breaking module boundaries, mismanaging dependency injection, and skipping input validation; following established backend conventions prevents these architectural and security issues.