delete data from mongodb collection when date was get expired

Question

I had a collection which holds user session and it has a field expiry date. I am looking for a trigger like function in MongoDB which triggered when any of the records dates get expired and I can delete that record.

here is how my collection look like

{
 _id:"123",
 sessionId:"dummy",
 token:"asdasd",
 deviceId:"123213",
 expiryDate:"date"
}

Answer 1

Assuming expiryDate is an actual Date type and not a string, you can use a TTL index to do this.

db.mycoll.createIndex({expiryDate: 1}, {expireAfterseconds: 0})

Will instruct MongoDB to automatically delete documents from the collection once the current time is greater than expiryDate .