我在 mongodb 中上传图片时遇到错误无法读取未定义的属性“缓冲区”

Question

When I upload the pdf using multer in mongodb in node.js then I got error "Cannot read property 'buffer' of undefined".I am trying to upload the pdf file in database.Please help to resolve this issue.Thanks in advance.

const express=require('express');
const multer=require('multer');
const getstream = require('get-stream');
const resume=require('../model/Resume')

const router = new express.Router();
const uplaod = multer({

    limits:{
      fileSize: 100000
    },

    fileFilter(req,file,cb)
    {
      if(!file.originalname.endsWith('pdf'))
      {
        return cb(new Error('Upload the pdf file'))
      }

      cb(undefined,true);
    }
  });
router.post('/Resume',uplaod.single('avatar'),async (req,res)=>{


     req.resume.avatar=req.file.buffer
      await req.resume.save();
      res.send({sucess:'sucess'});
    },(error,req,res,next)=>{

      //It is used for print message otherwise it will give long html message

      res.status(404).send({error:error.message});
    })



  module.exports=router;

Answer 1

req.file does not exist, that's why you got this error

I think it should be req.files.file.buffer

if not, try to console.log(req) , and trace it to find the file

if there is no files or file in the req object, then the file hasn't been sent to the request