mongoid/mongoid — Issue #1664: use ObjectId instead adding created_at field in Timestamps module
Author: skyeagle
Created: 2012-02-01 08:08:35+00:00
State: open

What do you think about subject?

And there will be an aliases:

```ruby
where :created_at.gt => 3.days.ago
```

instead of:

```ruby
where :id.gt => BSON::ObjectId.from_time(3.days.ago)
```

Due to ObjectId has default ascending ordering and indexes i suppose It will be awesome improvement.
Any thoughts?