oa_based/src/modules/tools/upload/upload.dto.ts

import { MultipartFile } from '@fastify/multipart';
import { ApiProperty } from '@nestjs/swagger';

import { IsDefined } from 'class-validator';

import { IsFile } from './file.constraint';

export class FileUploadDto {
  @ApiProperty({ type: Buffer, format: 'binary', description: '文件' })
  @IsDefined()
  @IsFile(
    {
      mimetypes: ['image/png', 'image/gif', 'image/jpeg', 'image/webp', 'image/svg+xml'],
      fileSize: 1024 * 1024 * 10,
    },
    {
      message: '文件类型不正确',
    }
  )
  file: MultipartFile;
}