drudge/mongoose-timestamp — pull request #7 by tsabolov (2014-01-03 20:01:59+00:00)
Title: Extended _id field checking

Check if the **_id** field is present and its type is ObjectId. This is useful in case schema was defined with **_id** field with a type other than ObjectId. I.e. I am using mongoose-shortid and getting an error when this module trying to extract a timestamp from ObjectID.