uplod more file in FileFieldsInterceptor only return one file

[SGAMERyu]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current behavior

To upload multiple files (all with different field name keys) but nest only return one file other key file is return emptry string

Minimum reproduction code

https://codesandbox.io/p/devbox/upbeat-sea-rtxtwx?file=%2Fsrc%2Fapp.controller.ts%3A12%2C29

Steps to reproduce

No response

Expected behavior

return all files

Package

• [ ] I don't know. Or some 3rd-party package
• [X] code>@nestjs/common</code
• [X] code>@nestjs/core</code
• [ ] code>@nestjs/microservices</code
• [X] code>@nestjs/platform-express</code
• [ ] code>@nestjs/platform-fastify</code
• [ ] code>@nestjs/platform-socket.io</code
• [ ] code>@nestjs/platform-ws</code
• [ ] code>@nestjs/testing</code
• [ ] code>@nestjs/websockets</code
• [ ] Other (see below)

Other package

No response

NestJS version

10.0.0

Packages versions

"dependencies": {
    "@nestjs/common": "^10.0.0",
    "@nestjs/core": "^10.0.0",
    "@nestjs/platform-express": "^10.0.0",
    "@prisma/client": "^5.6.0",
    "cloudinary": "^1.41.0",
    "dotenv": "^16.3.1",
    "reflect-metadata": "^0.1.13",
    "rxjs": "^7.8.1"
  },
  "devDependencies": {
    "@nestjs/cli": "^10.0.0",
    "@nestjs/schematics": "^10.0.0",
    "@nestjs/testing": "^10.0.0",
    "@types/express": "^4.17.17",
    "@types/jest": "^29.5.2",
    "@types/multer": "^1.4.11",
    "@types/node": "^20.3.1",
    "@types/supertest": "^2.0.12",
    "@typescript-eslint/eslint-plugin": "^6.0.0",
    "@typescript-eslint/parser": "^6.0.0",
    "eslint": "^8.42.0",
    "eslint-config-prettier": "^9.0.0",
    "eslint-plugin-prettier": "^5.0.0",
    "jest": "^29.5.0",
    "prettier": "^3.0.0",
    "prisma": "^5.6.0",
    "source-map-support": "^0.5.21",
    "supertest": "^6.3.3",
    "ts-jest": "^29.1.0",
    "ts-loader": "^9.4.3",
    "ts-node": "^10.9.1",
    "tsconfig-paths": "^4.2.0",
    "typescript": "^5.1.3"
  },

Node.js version

v21.2.0

In which operating systems have you tested?

• [ ] macOS
• [X] Windows
• [ ] Linux

Other

No response

[jmcdo29]

This worked fine when I ran it on my machine. I updated the controller to send back the properties as well, just to show how it's being read:

@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}

  @Post('add')
  @UseInterceptors(
    FileFieldsInterceptor([
      { name: 'poster', maxCount: 1 },
      { name: 'icon', maxCount: 1 },
    ]),
  )
  async add(@UploadedFiles() files, @Body() body) {
    console.log(files);
    console.log(body);
    return {
      files: Object.keys(files).map((file: any) => ({
        fieldName: files[file][0].fieldname,
        originalName: files[file][0].originalname,
      })),
      body,
    };
  }
}

Then made this request:

curl http://localhost:3000/add -F 'icon=@README.md' -F 'poster=@README.md' -F 'name=test'

And got this response

HTTP/1.1 201 Created
Connection: keep-alive
Content-Length: 132
Content-Type: application/json; charset=utf-8
Date: Fri, 08 Dec 2023 16:53:14 GMT
Etag: W/"84-w7KuOQTWKSnYt3rEgEUqrCw83s4"
Keep-Alive: timeout=5
X-Powered-By: Express

{
    "files": [
        {
            "fieldName": "icon",
            "originalName": "README.md"
        },
        {
            "fieldName": "poster",
            "originalName": "README.md"
        }
    ],
    "body": {
        "name": "test"
    }
}

Everything looks fine here