Stop Hand-Rolling Input Checks in NestJS: Use ValidationPipe as a Contract
Stop writing manual input checks. Use NestJS ValidationPipe with class-validator to enforce request contracts, transform payloads, and centralize error formatting.
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nestjsNestJS ValidationPipe with class-validator: global setup and limits
Register ValidationPipe globally with transform and whitelist to get automatic 400 responses for bad payloads, class instances in handlers, and stripping of unknown fields. Learn the mechanism, a minimal config, and common pitfalls.