How to set primary key in mongodb?

Question

I want to set one of my field as primary key. I am using mongodb as my nosql.

Answer 1

_id field is reserved for primary key in mongodb, and that should be an unique value. If you don't set anything to _id it will automatically fill it with "MongoDB Id Object". But you can put any unique info into that field.

Additional info: http://www.mongodb.org/display/DOCS/BSON

Hope it helps, Sinan.

Answer 2

If you want an index, create one. If you want a "PRIMARY KEY" you probably don't understand the concept of NoSql.