Validador de la clase de error personalizado de Nestjs
import { PipeTransform, Injectable, ArgumentMetadata, BadRequestException } from '@nestjs/common'
import { validate } from 'class-validator'
import { plainToClass } from 'class-transformer'
import { apiResponse } from '@helpers/helper.apiResponse'
@Injectable()
export class ValidationPipe implements PipeTransform<any> {
async transform(value: any, { metatype }: ArgumentMetadata) {
if (!metatype || !this.toValidate(metatype)) {
return value
}
const object = plainToClass(metatype, value)
const errors = await validate(object)
if (errors.length > 0) {
const errorsResponse: any = errors.map((val: any) => {
return apiResponse(400, Object.values(val.constraints)[0] as string)
})
throw new BadRequestException({ errors: errorsResponse })
}
return value
}
private toValidate(metatype: Function): boolean {
const types: Function[] = [String, Boolean, Number, Array, Object]
return !types.includes(metatype)
}
}
Restu Wahyu Saputra