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Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
backend ruleP1stack specificStack: NestJS
validationtypesclass-validator
Match validation decorators to the actual property type
Use type-appropriate validators (@IsNumber for numbers, @IsString for strings); a decorator that contradicts the declared type (e.g. @IsString on a number) is a bug.
PR: vinify-backend · org-mining-hist-2026-06Created: Jun 19, 2026
Bad example
Old codetypescript
| 1 | @IsString() |
| 2 | @IsOptional() |
| 3 | countryId?: number; |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | @IsNumber() |
| 2 | @IsOptional() |
| 3 | countryId?: number; |
Explanation (EN)
Objašnjenje (HR)