Validation Pipe for Yup & NestJS

yup-validation.pipe.ts

// NestJS documentation on schema pipes:
// https://docs.nestjs.com/pipes#schema-based-validation
import { ArgumentMetadata, BadRequestException, Injectable, PipeTransform } from '@nestjs/common';
import { SchemaOf, ValidationError } from 'yup';

@Injectable()
export class YupValidationPripe<T> implements PipeTransform {
  constructor(private schema: SchemaOf<T>) {}

  transform(value: T, _: ArgumentMetadata) {
    try {
      const validValue = this.schema.defined().validateSync(value, {
        stripUnknown: true,
        abortEarly: false,
      });
      return validValue;
    } catch (err) {
      if (err instanceof ValidationError) {
        throw new BadRequestException(
          err.errors,
          `The data received doesn't meet the requirements.`,
        );
      }
      throw err;
    }
  }
}