Decoupling NestJS Logic with Custom Providers
Stop hard-coding your service dependencies. Learn how to use NestJS Custom Providers (useClass, useValue, and useFactory) to build a decoupled architecture that is easy to test and configure.
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Choosing a Database Access Layer for NestJS: TypeORM vs. Prisma
A technical decision guide for NestJS developers comparing TypeORM and Prisma, focusing on type safety, architectural patterns, and deployment constraints.
prismaResolving Circular Dependency Errors in NestJS Bootstrap
Learn how to diagnose and fix circular dependency errors in NestJS using architectural refactoring and the forwardRef() utility to resolve bootstrap crashes.
Enforcing DTO Integrity in NestJS with the Global ValidationPipe
NestJS’s ValidationPipe turns DTOs into hard runtime contracts. Learn how to register it globally, enforce whitelisting, handle errors, and balance performance in this practical guide.
Hardening NestJS REST Controllers with ValidationPipe
Enforce payload shape and type safety at the application edge using ValidationPipe and class-validator to prevent invalid data from reaching your service layer.
Managing Per-Request State in NestJS: When to Move Beyond Singletons
Stop passing user and tenant IDs through every service method. Learn how to use NestJS Request Scope to handle per-request state cleanly while understanding the performance trade-offs.
Choosing between nest update CLI and manual package.json edits for deterministic rollback after a failed NestJS major upgrade
The goal is to guarantee a reversible upgrade path when a NestJS major release alters decorator signatures or DI configuration, allowing teams to restore the pre‑upgrade state without losing uncommitted work. The nest update CLI speeds up dependency resolution to the latest compatible versions but provides no built‑in mechanism to revert transitive changes,
Automate vs Manual TypeORM Migrations in NestJS
The goal is to achieve zero‑downtime deployments while preserving the ability to roll back a schema change safely in a NestJS application that uses TypeORM. Two documented approaches exist: enabling the synchronize flag so TypeORM updates the schema automatically on startup, or generating explicit up/down migration scripts and running them via the NestJS/Typ
Authorization Logic: Guard vs Interceptor for Request Filtering
Request Lifecycle Design When implementing access control in a NestJS application (v10+), there is a design choice between using Guards and Interceptors to handle authorization logic. While both can intercept incoming requests, they operate at different stages of the request pipeline. Constraints and Trade-offs Guards are executed before Interceptors and are