Question about incrementing data value, from a specific collection in mongodb with nodejs

Question

So I followed a tutorial which has taught me some things about nodejs and mongodb. I now know how to insert new data from the server in to my database.

But what I can't seem to figure out is how to update existing data in a collection. I have searched on a lot of places but sadly no clear answer for me. I am a little of a noob still with this so excuse me if i say things that are probably wrong.

So this is what I've tried to set up:

Code from my Controller.js:

 app.get("/button", function(req, res) { mongo.connect(url_monitor, function (err, db) { assert.equal(null, err); db.numbers.update({ $inc: { number: -2}}) getData(res); }) }) }

I am using the MVC model that has the: controller, model and view. So all pages in the view folder are.ejs files. I am also using jQuery and ajax to send a request to the controller.

button.js:

 $(document).ready(function(){ $('#btn1').on('click', function(){ var number = {number: 0} $.ajax({ type: 'GET', url: '/button', data: number, success: function(number){ //do something with the data via front-end framework location.reload(); alert('It works') } }); }); })

button.ejs:

 <:DOCTYPE html> <html lang="en"> <head> <script src="https.//code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script> <script src="/assets/button,js"></script> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width. initial-scale=1.0"> <title>Todo List</title> <link href="/assets/styles.css" rel="stylesheet" type="text/css"> </head> <body> <h1>Button test</h1> <button id="btn1">Increase number</button> </body> </html>

So basically what I am trying to achieve is that once I press a button somewhere on a page, it would increase/decrease a value in the database in one of the specific collections. I am kinda lost with this, any help would be appreciated.

Answer 1

After searching for a very long time, i finally found the solution. If anyone else is having this issue then refer to this link: https://docs.mongodb.com/drivers/node/usage-examples/updateOne

Question about incrementing data value, from a specific collection in mongodb with nodejs

Question

1 answers

solution1
0 ACCPTED 2021-01-22 16:36:17

Question about incrementing data value, from a specific collection in mongodb with nodejs

Question

1 answers

solution1 0 ACCPTED 2021-01-22 16:36:17

solution1
0 ACCPTED 2021-01-22 16:36:17