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hapi.jsnestjs

NestJS pipe Joi.validate() (is not a function)

I try to use Joi validator on NestJS with pipe.

https://docs.nestjs.com/pipes#object-schema-validation

import * as Joi from '@hapi/joi';
import { PipeTransform, Injectable, ArgumentMetadata, BadRequestException } from '@nestjs/common';

@Injectable()
export class JoiValidationPipe implements PipeTransform {
  constructor(
    private readonly schema: Joi.ObjectSchema,
  ) {}

  transform(value: any, metadata: ArgumentMetadata) {
    const { error } = Joi.validate(value, this.schema);

    if (error) {
      throw new BadRequestException('Validation failed');
    }

    return value;
  }
}

It doesn't work properly.

TypeError: Joi.validate is not a function

Solution

  • Use schema.validate in place of Joi.validate, for example:

    const schema = Joi.object({
    name: Joi.string().min(3).required()
});
const result = schema.validate(req.body);

    or for more info go to https://hapi.dev/family/joi/?v=16.1.8