带有mongoskin的时间戳如何？

Question

For those who want to query for timestamp here's how you do that:

> db.foo.find()
{ "_id" : ObjectId("4e43a21d84782019413162ed"), "a" : { "t" : 1313055261000, "i" : 1 } }
> db.foo.find({'a': {'$gte': new Timestamp(new Date(2011, 8-1, 11), 0) } })
{ "_id" : ObjectId("4e43a21d84782019413162ed"), "a" : { "t" : 1313055261000, "i" : 1 } }
> db.foo.find({'a': {'$gte': new Timestamp(new Date(2011, 8-1, 12), 0) } })

i find that example in mongodb's page... but if i want to insert a timestamp in mongodb using mongoskin following the example???

i try this:

db.collection('times').insert({time: new Timestamp(new Date('2012-08-06'),0)})

this is the error:

ReferenceError: Timestamp is not defined

Answer 1

Well that's because Timestamp is not defined. It's neither part of JavaScript nor Node. You should define it before using. This should work:

var mongoskin = require('mongoskin');
var Timestamp = mongoskin.BSONPure.Timestamp;

Note that this Timestamp s are for internal db use only ; why do you need them, when there are Date.now() and new Date().getTime() ?

Anyway, here's a link with some more details — http://mongodb.github.com/node-mongodb-native/api-bson-generated/timestamp.html .