如何在 MongoDB 上一段时间后删除组件？

Question

I am currently creating a simple web app using Node.js and MongoDB. I am trying to delete whatever I enter into this field: shows what my webpage looks like

When I enter something and click the button, it creates a collection in my MongoDB database. However, I want these collections to delete after some time. I have tried using db.log_events.createIndex( { "createdAt": 1 }, { expireAfterSeconds: 3600 } ) , but that did not work. I have also tried doing:

app.get('/', (req, res) =>
    {
        **db.collection('test').find().toArray().createIndex( { "createdAt": 1 }, { expireAfterSeconds: 60 } )**
        .then(test => {
           res.render('index.ejs', {test: test})
            //console.log(results)
        })


        .catch(error => console.error(error))
       // res.render('index.ejs', {}); 
        //res.render(view, locals)
    })

but that did not work either. I am not sure what I have to do differently. Sorry if this was somewhat confusing, I am new to Node and MongoDB! Thanks in advance!

Answer 1

this works. (I use Mongoose and MongoDB) I hope may it help.

createdAt: { 
    type: Date, 
    expires: '15m',  // mention the time to expire
    default: Date.now 
}