Class-validator-i18n

The translator for class-validator

Class-validator-i18n is a translator to class-validator library.

Decorators already translated

You can check the translated decorators at the links below.

• Array decorators
• Common decorators
• Date decorators
• Number decorators
• Object decorators
• String decorators
• Type checker decorators

How to use

First, export an environment variable called CLASS_VALIDATOR_I18N_LANGUAGE specifying the language. The default language is en-US.

export CLASS_VALIDATOR_I18N_LANGUAGE=pt-BR

After that you just need to use the decorators imported from 'class-validator-i18n' instead of the original 'class-validator'. All the validators that are not translated yet will still working with original messages in english.

import { IsArray, IsString } from 'class-validator-i18n';

export class Testing {
  @IsArray()
  array: string[];

  @IsString({ description: 'Description os testing' })
  description: string;
}

Attention

For NestJS projects, define variable before starts the project, for example, inside the package.json, on start:dev script or wherever.

NestJS doesn't guarantee that .env file will loads before decorators. This will make your errors be in default language, that is en-US.

Supported languages

Supported languages	env variable
English (US)	en-US (default)
Portuguese (BR)	pt-BR