nestjs pipe parse array

Restu Wahyu Saputra answered on March 8, 2025 Popularity 1/10 Helpfulness 1/10

answer nestjs pipe parse array

nestjs pipe parse array

Comment

import { applyDecorators, ArgumentMetadata, Injectable, PipeTransform, UsePipes, HttpStatus as status } from '@nestjs/common'
import { ClassConstructor, plainToClass } from 'class-transformer'
import { validate, ValidationError } from 'class-validator'
import { response } from '../helpers/response.helper'

@Injectable()
class Pipe implements PipeTransform {
  private metaTypes: ClassConstructor<any>[]

  constructor(roles: ClassConstructor<any>[]) {
    this.metaTypes = roles
  }

  async transform(properties: any, metadata: ArgumentMetadata) {
    try {
      const errorsResponse: ValidationError[] = []

      if (metadata.type === 'body' && Array.isArray(properties)) {
        for (const propertie of properties) {
          for (const MetaType of this.metaTypes) {
            const object: Record<string, any> = plainToClass(MetaType, propertie)
            const errors: ValidationError[] = await validate(object)
            errorsResponse.push(...errors)
          }
        }
      } else if (metadata.type === 'query' && Array.isArray(properties)) {
        for (const propertie of properties) {
          for (const MetaType of this.metaTypes) {
            const object: Record<string, any> = plainToClass(MetaType, propertie)
            const errors: ValidationError[] = await validate(object)
            errorsResponse.push(...errors)
          }
        }
      }

      const errorMessage = errorsResponse.map((val: ValidationError) => response({ stat_code: status.UNPROCESSABLE_ENTITY, error: Object.values(val.constraints)[0] }))
      if (errorMessage.length) {
        throw response({ stat_code: status.UNPROCESSABLE_ENTITY, errors: errorMessage })
      }

      return properties
    } catch (e: any) {
      throw response(e)
    }
  }
}

export const ParseArrayPipe = (...MetaTypes: ClassConstructor<any>[]) => applyDecorators(UsePipes(new Pipe(MetaTypes)))

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript nestjs pipe

Link to this answer
Share Copy Link

Contributed on Mar 08 2025

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

nestjs pipe parse array

Contents

More Related Answers

nestjs pipe parse array

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.