Locks Are Not Syntax, They Are Boundaries
A practical explanation of what locks are for, when to consider them, how optimistic and pessimistic locking differ, and why local locks are not enough in distributed systems.
Backend
3 posts
NestJS Interceptors and How to Skip Response Wrapping
How to use a global NestJS interceptor to wrap successful API responses, and how to skip wrapping for webhooks, file downloads, and protocol-specific endpoints.
A SQL Injection Incident Review: NestJS Validation, Logs, and Server-Side Security
A practical review of a SQL injection issue found during a Mini Program security test, covering NestJS validation, ORM query safety, PM2 logs, database constraints, and defense in depth.