Delete MongoDB document at specific time

Question

I am looking into deleting a document at a specific time.

const TestSchema = new Schema({
 expire_at: {
 type: Date,
 },
}, {
 timestamps: true,
});
TestSche         


        

Answer 1

To delete MongoDB document in specific time you can use TTL (time to live). TTL indexes are special single-field indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of time.

So you need to create a TTL index like: (mongo shell command)

db.yourCollecName.createIndex({"expire_at": 1 }, { expireAfterSeconds: 5 } );

or you can use mongoose to create this index

TestSchema.createIndex({"expire_at": 1 }, { expireAfterSeconds: 5 } );

then mongodb check after every 60 second and if expire_at date time is less than the current date time then this record will remove after 5 second.

The TTL index does not guarantee that expired data will be deleted immediately upon expiration. There may be a delay between the time a document expires and the time that MongoDB removes the document from the database.

The background task that removes expired documents runs every 60 seconds. As a result, documents may remain in a collection during the period between the expiration of the document and the running of the background task.

TTL Indexes

NB: Use createIndex instead of index