Timestamp mongodb using node.js

Question

i have a mongodb database connected to a node.js app via mongodb-native-drivers. I am inserting data into the database, and need to timestamp it, the code looks like the following:

var server = new Server('localhost', 27017, { auto_reconnect: true }); var db = new Db('test', server); exports.fetch = function(args, callback) { db.open(function(err, db) { db.collection(args['device'], function(err, collection) { var doc = { device: args['device'], data: args['data'], time: new db.bson_serializer.Timestamp() } collection.insert(doc, { safe: true }, function(err,result) { db.close(); callback(lastestError); }); }); }); }

The insert goes well, except for the timestamp, which is always 0! I have removed all error checking for clarity and size. Any help would be appreciated! Thanks.

couldn't you just use type Date and something like Date.now()? Does it have to be a Timestamp? — Philipp Kyeck
– Philipp Kyeck, Commented Oct 13, 2011 at 14:59
yeaa, if no one knows the fault that what ill end up doin. It just seems more right to make mongodb fill in the timestamp — rissicay
– rissicay, Commented Oct 13, 2011 at 16:29

cjfont · Accepted Answer · 2012-03-28 19:05:47Z

The MongoDB documentation states that "Timestamp data type but that is a special internal type for MongoDB that typically should not be used":

http://www.mongodb.org/display/DOCS/Dates

ISODate() is the correct type to use.

Samyak Bhuta · Accepted Answer · 2011-10-21 16:10:23Z

I think value 0 is as per expectation. You need to provide the low (signed) 32 bits of the Timestamp and the high (signed) 32 bits of the Timestamp values when you create the object ! Correction would be here. "new db.bson_serializer.Timestamp(someIntLow,someIntHigh)"

See https://github.com/christkv/node-mongodb-native/blob/master/lib/mongodb/bson/timestamp.js#L41 for more.

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