NestJS module for adding translations to the application, with a pipe for translating validation errors

Installation

npm i --save nestjs-translates class-validator-multi-lang class-transformer

Links

https://github.com/EndyKaufman/nestjs-translates - Source code

https://nestjs-translates.site15.ru/api - Demo application with nestjs-translates.

https://github.com/EndyKaufman/nestjs-translates-example - Example generated with nest cli

https://dev.to/endykaufman/nestjs-module-for-adding-translations-to-the-application-with-a-pipe-for-translating-validation-errors-2mf3 - Post in dev.to

https://twitter.com/KaufmanEndy/status/1498730314339954695?s=20&t=FwCcltTG-Vxut6M3JVPsCA - Twitter post

Usage

Update file in app.module.ts

import { HttpException, HttpStatus, Module } from '@nestjs/common';
import { ValidationError } from 'class-validator-multi-lang';
import { TranslatesModule } from 'nestjs-translates';
import { join } from 'path';
import { AppController } from './app.controller';

@Module({
  imports: [
    TranslatesModule.forRootDefault({
      localePaths: [
        join(__dirname, 'assets', 'i18n'),
        join(__dirname, 'assets', 'i18n', 'class-validator-messages'),
      ],
      defaultLocale: 'en',
      locales: ['en', 'ru'],
      validationPipeOptions: {
        transform: true,
        validationError: {
          target: false,
          value: false,
        },
        transformOptions: {
          strategy: 'excludeAll',
        },
        exceptionFactory: (errors: ValidationError[]) =>
          new HttpException(errors, HttpStatus.BAD_REQUEST),
      },
      // disable multi language validation pipe
      // usePipe: false
    }),
  ],
  controllers: [AppController],
})
export class AppModule {}

Create dictionaries ../assets/i18n/ru.json

{
  "word": "слово"
}

Use translates module with isolated storage for translations in only one feature module

import { TranslatesModule } from 'nestjs-translates';
import { join } from 'path';

@Module({
  imports: [
    SubFeatureModule,
    TranslatesModule.forFeature({
      localePaths: [join(__dirname, 'assets', 'feature-i18n')],
      defaultLocale: 'en',
      locales: ['en', 'ru'],
    }),
  ],
})
export class FeatureModule {}

License

MIT