Image File Not Being Saved in MongoDB

I am using MERN technologies to create a news article web application.

To do this, I have the following Mongoose Schema:

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

let Article = new Schema({
    article_title: {
        type: String,
        required: true
    },
    article_summary: {
        type: String,
        required: true
    },
    article_content: {
        type: String,
        required: true
    },
    article_image: {
        type: String,
        required: true
    },
    article_reference: {
        type: String,
        required: true
    }
});

module.exports = mongoose.model('Article', Article);

And the following Express server, where I have a post method that above informations as a "req.body" and "req.file" to save in db using Mongoose and Multer:

const multer = require('multer');
const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const cors = require('cors');
const mongoose = require('mongoose');
const articleRoutes = express.Router();
const PORT = process.env.PORT || 4000;

let Article = require('./article.model');

app.use(cors());
app.use(bodyParser.json());

mongoose.connect('mongodb://127.0.0.1:27017/article', { useNewUrlParser: true, useUnifiedTopology: true });
const connection = mongoose.connection;

connection.once('open', function() {
    console.log("MongoDB database connection established successfully");
});

const storage = multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, "images");
    },
    filename: (req, file, cb) => {
        cb(null, Date.now() + "--" + file.originalname);
    }
});

const upload = multer({ storage: storage });

articleRoutes.route("/content-management-system/add").post(upload.single("article_image"), (req, res) => {
    console.log("START FROM HERE");
    const article = new Article({
        article_title: req.body.article_title,
        article_summary: req.body.article_summary,
        article_content: req.body.article_content,
        article_image: req.file.article_image,
        article_reference: req.body.article_reference
    });
    console.log(article);
    console.log(mongoose.connection.readyState);
    article
        .save()
        .then(() => {
            console.log("Saved successfully!");
            res.status(200).json({'article': 'article saved successfully'});
        })
        .catch(err => {
            console.log("Article save unsuccessful!");
            console.log("article: " + article);
            console.log(req.file);
            console.log(req.body);
            res.status(400).send('adding new article failed');
        });
});

However, when I pass a post request on Postman, it fails with a 400 Error saying "Bad Request". As you can see, in the above code, I have many console.logs that shows the value of req.file and req.body and article. When I look on my console, it shows that these values do not include article_image. Below is a photo of the console.logs:

Sorry, for the many code examples, but most of it's just boilerplate code, and the question is simply: Why is my article_image file, which is saving in my image file with Multer, not saving on my MongoDB?

Solution

just try article_image: req.file.path instead of article_image: req.file.article_image