Multipart Multiple Files upload in NestJs Framework

To upload multiple files (all with different field name keys), use the FileFieldsInterceptor() decorator. This decorator takes two arguments:

• uploadedFields: an array of objects, where each object specifies a required name property with a string value specifying a field name, as described above, and an optional maxCount property.
• options: optional MulterOptions object, as described

When using FileFieldsInterceptor(), extract files from the request with the @UploadedFiles() decorator.

@Post('upload')
@UseInterceptors(FileFieldsInterceptor([
  { name: 'avatar', maxCount: 1 },
  { name: 'background', maxCount: 1 },
]))
uploadFile(@UploadedFiles() files: { avatar?: Express.Multer.File[], background?: Express.Multer.File[] }) {
  console.log(files);
}

To upload all fields with arbitrary field name keys, use the AnyFilesInterceptor() decorator. This decorator can accept an optional options object as described.

When using AnyFilesInterceptor(), extract files from the request with the @UploadedFiles() decorator.

@Post('upload')
@UseInterceptors(AnyFilesInterceptor())
uploadFile(@UploadedFiles() files: Array<Express.Multer.File>) {
  console.log(files);
}

You may visit Multipart Single File upload in NestJs Framework

You may visit Multipart Array of Files upload in NestJs Framework

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