How to use regexp for validate in nestjs?

Question

I want to use regexp in validation in nestjs.

For example:

RegExp

pagePattern    = '[a-z0-9\-]+';

Method

  @Get('/:article')
  getIndex(
   @Param('article')
  ) {

  }

What can I use? ValidationPipe?

Answer 1

I would create a DTO class like

class ArticleParamDTO {
  @Matches('[a-z0-9\-]+') // comes from class-validator
  article: string;
}

And then you can use it in the route handler like

@Get(':article')
getIndex(@Param() { article }: ArticleParamDto) {

}

And then as long as you use the ValidationPipe it will all work. Anything that doesn't match will cause a 400 BadRequest