MongoDB: Only fetch documents created in the last 24hrs?

Question

I want to limit a query I\'m making to only look in documents that were created in the past 24 hrs.

What is the best way to structure this query? How do I go about

Answer 1

If you're not using any other indexes and are using the default ObjectID as your _id, you can do the following:

var ObjectID = require('mongodb').ObjectID

db.collection.find({
  _id: {
    $gt: ObjectID.createFromTime(Date.now() / 1000 - 24*60*60)
  }
}, callback)