我正在创建一个nodejs书店应用程序 . Books details which are strings/numbers/booleans are to be saved in MongoDB using mongoose 而 book cover image is to be saved in an uploads folder in my root directory using multer .Here是我的 mongoose schema ：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

//Creating schema and model
var BookDataSchema = new Schema({
title: String,
author: String,
isbn: String,
price: Number,
quantity: Number,
availability: Boolean,
description: String
});

var BookData = mongoose.model('BookData', BookDataSchema);
module.exports = BookData;

这是执行保存功能的代码：

router.post('/', function (req, res) {
  var newBook = new BookData({
    title: req.body.bkname,
    author: req.body.bkauthor,
    isbn: req.body.bkisbn,
    price: req.body.bkprice,
    quantity: req.body.bkquant,
    description: req.body.bkdesc
  });
      newBook.save(function (err) {
        if (err) {
          console.log(err);
        } else {
          console.log(newBook);
          console.log('Book Details saved successfully');
        }
      });
    }, function(req, res) {upload(req, res, (err) => {
        if (err) {
          console.log(err);
          res.render('admin', {
            msg: err
          });
        } else {
          console.log(req.file);
          return res.render('admin');
        }});}
      );

主要的问题是当我在console.log（newBook）或console.log（结果）或者检查mongo shell时，我看到的是 { _id: 5b4fdba80420890764ce13bf, __v: 0 } ，只显示了mongodb创建的 id ，这意味着其他数据没有保存，更糟糕的是它不进入其他回调功能 . 除了这个警告，我没有收到任何错误：

(node:1220) [DEP0079] DeprecationWarning: Custom inspection function on Objects via .inspect() is deprecated

我测试了用于保存图像的代码，不包括用于保存其他数据的代码，并且工作正常 . 请帮助解决可能存在的问题，并告诉我如何在保存所有内容后确保管理页面呈现 . 查看整个项目in_this_git_repo

node.js mongodb mongoose