mongodb - Go mgo new record? -

is possible detect whether i'm working new record or old record using mgo?

an example of mean implemented in rails activerecord:

object.new_record?

there's no such concept of new/old record mgo. far driver concerned, it's data have in memory. can load data database in in-memory value, in multiple in-memory values, , can save back, under same id or different one, , can save different database under different session. driver asked do.

the application can implement own concept of new/old adding field struct , setting appropriate. make field unexported or use field tag bson:"-" prevent mgo storing field.

if application relies on database assign document id, application can check id field determine if document new or old.