Rules Hub
Coding Rules Library
← Back to all rules
Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
backend ruleP1stack specificStack: NestJS
validationclass-validatorcorrectness
Validate a real DTO instance, not a plain object
class-validator only validates class instances; pass a DTO instance (e.g. via plainToInstance) rather than a plain object literal, or validation silently passes.
PR: vinify-backend · org-mining-hist-2026-06Created: Jun 19, 2026
Bad example
Old codetypescript
| 1 | await validate({ name, price }); // plain object, decorators not applied |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | await validate(plainToInstance(StoreStockCreateDto, { name, price })); |
Explanation (EN)
Objašnjenje (HR)