service-pattern-nestjs

To structure NestJS services for multi-entity workflows, use an Orchestration Service pattern to coordinate across modules while relying on Model Services for single-entity operations. This separation enforces clear layering and decouples business logic from data access.

The best way to decouple NestJS services from the ORM is by applying a repository pattern for data access. This approach uses repository-driven methods within the service layer to prevent direct ORM type dependencies in business logic.

Handle transactions in NestJS orchestration services by applying CLS-based @Transactional decorators. This pattern supports explicit orchestration transactions for multi-entity workflows, ensuring consistent data operations across module boundaries.

Standardize error handling and data reads in NestJS by using domain or HTTP-safe error patterns for failures and implementing safe read paths that return null. This approach prevents unhandled exceptions and standardizes missing data responses.

Separate Model Services and Orchestration Services in NestJS when scaling applications to maintain consistency across modules. Use Model Services for isolated single-entity operations and Orchestration Services when coordinating complex multi-entity business logic.

Yes, you need schema payloads to validate inputs in NestJS services. Enforcing validation via schema payloads ensures that business logic receives properly structured data before executing repository-driven data access operations.