Question

I’m trying to perform a range query for a collection of tweets in a mongo database. For some reason the following query will work:

db.posts.find({'created_at': {$gte:"Fri Nov 25 00:00:00 +0000 2011", $lt:"Fri Nov 25 23:59:59 +0000 2011"}})

But the following will not:

db.posts.find({'created_at': {$gte:"Thu Nov 24 00:00:00 +0000 2011", $lt:"Fri Nov 25 23:59:59 +0000 2011"}})

I’m entering the tweet as a JSON object directly into the database, so this shouldn’t be an issue, correct?

Answer 1

You need to make sure you are using real Date values, not strings. For example:

var from = ISODate("2011-11-24")
var to = ISODate("2011-11-25T23:59:59")
db.posts.find({ created_at : { $gte : from, $lt : to } })

Besides making sure your queries are using real Date values, make sure your stored data contains real Date values also.