ttl index mongodb code example

Example 1: mongodb index

db.collection.createIndex( { name: -1 } )

Example 2: mongodb conditional expire

let keys = { lastModifiedDate: -1 };
let options = { 
    expireAfterSeconds: 3600, 
    partialFilterExpression: { pending: true }
};
db.getCollection("collection").createIndex(keys, options);