Hello experts, I am venturing into backend technology for the first time. As part of my project, I am trying to upload files and text to my database using nodejs and mongoDB. However, I keep encountering an error message that is impeding my progress. I would greatly appreciate any advice or guidance on this matter. Thank you in advance.
Here is a snippet of my server code:
const express = require('express');
const {default:mongoose} = require('mongoose');
const multer = require('multer');
const Storage = multer.diskStorage({
destination: 'uploads',
filename:(req, file, cb)=> {
const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9)
cb(null, file.originalname);
},
})
const upload = multer({
storage:Storage
}).single('image')
const Blog = require('./models/blog.js');
mongoose
.connect("mongodb://127.0.0.1:27017/filesUpload")
.then(()=>{console.log('Mongo server has started')})
.catch(()=>{console.log('Connection to Mongo Failed')})
const app = express();
const port = 3000;
app.set('views engine', 'ejs')
app.use(express.static("public"));
app.use(express.urlencoded());
app.use(express.json());
app.get("/", async (req, res)=>{
const blogs = await Blog.find()
res.render('index.ejs', {title: 'HOME', blogs})
})
app.post("/blogs/create", (req, res)=>{
upload = (req, res, (err)=>{
if (err){
console.log(err)
}
else{
const blog = new Blog({
title: req.body.title,
snippet: req.body.snippet,
body: req.body.body,
image: {
date: req.file.filename,
contentType: "image/jpg"
}
});
blog.save().then(()=>{
res.redirect('/')
}).catch((err)=>{
console.log(err)
})
}
})
})
app.listen(port, ()=>{
console.log('Server is currently running')
})
When I attempt to initiate a post request, I encounter the following error message:
TypeError: Assignment to constant variable.
at C:\Users\go\Desktop\not\files\app.js:53:12
at Layer.handle [as handle_request] (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\route.js:144:13)
at Route.dispatch (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\route.js:114:3)
at Layer.handle [as handle_request] (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\go\Desktop\not\files\node_modules\express\lib\router\index.js:284:15
at Function.process_params (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\index.js:346:12)
at next (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\index.js:280:10)
at jsonParser (C:\Users\go\Desktop\not\files\node_modules\body-parser\lib\types\json.js:119:7)
at Layer.handle [as handle_request] (C:\Users\go\Desktop\not\files\node_modules\express\lib\router\layer.js:95:5)