javascript - 提取和验证

Question

我正在开发一个基于nest.js框架的项目

以下是我的函数的片段:

  @Post('beneficiaries/:beneficiaryId/bankDetails')
  @HttpCode(HttpStatus.OK)
  async addBankDetails(@Param('beneficiaryId', new ValidationPipe()) beneficiaryHash: BeneficiaryHashIdDto, @Body() body, @Headers() headers) {
    const beneficiary = await this.beneficiaryService.getBeneficiaryIdFromHash(beneficiaryHash, ['beneficiaryId', 'currencyCode', 'countryCode']);
    let routingOptions = await this.beneficiaryService.getBeneficiaryRoutingConfig(beneficiary.beneficiaryId, pick(headers, GET_HEADERS_LIST));
    routingOptions = lmap(routingOptions, partialRight(pick, ['bankDetail', 'beneficiaryRoutingConfigId']));
    const [routingConfig] = routingOptions.filter(item => item.beneficiaryRoutingConfigId === body.beneficiaryRoutingConfigId);
    if (!routingConfig) {
      throw new BadRequestException('Invalid beneficiaryRoutingConfigId');
    }
    const { error } = this.beneficiaryService.bankDetailsSchema(routingConfig.bankDetail).validate(body, { abortEarly: false });
    if (error) {
      throw new BadRequestException(error);
    }

    // write here logic to validate routing codes
    await this.beneficiaryService.validateBeneficiaryBankDetails(routingConfig, body, pick(headers, GET_HEADERS_LIST), beneficiary);
    // write here logic to insert bank details of bene
    return this.beneficiaryService.updateBankDetails(body, headers, beneficiary.beneficiaryId);
  }

Nest 允许我们提取请求的参数、 header 、正文等。

https://docs.nestjs.com/controllers

我想从我的参数中提取特定的 key

例如我的参数包含:1.客户端ID2.客户ID3.受益人Id

我可以取出 beneficiaryId 并将其存储在 beneficiaryHash 中，但无法同时执行验证。有什么解决办法吗？

Answer 1

您可以通过自定义管道到达它。例如 ParseIntPipe

import { PipeTransform, Injectable, ArgumentMetadata, BadRequestException } from '@nestjs/common';

@Injectable()
export class ParseIntPipe implements PipeTransform<string, number> {
  transform(value: string, metadata: ArgumentMetadata): number {
    const val = parseInt(value, 10);
    if (isNaN(val)) {
      throw new BadRequestException('Validation failed');
    }
    return val;
  }
}

@Get(':id')
async findOne(@Param('id', new ParseIntPipe()) id) {
  return this.catsService.findOne(id);
}

更多知识请阅读https://docs.nestjs.com/pipes#transformation-use-case