Rethinker

Rethinker is a Ruby ORM for RethinkDB.

Installation

gem 'rethinker'

Compatible with Rails 3 and Rails 4
Autogeneration of ID, MongoDB style
Creation of database and tables on demand
Attributes accessors (attr_accessor)
Dynamic attributes
Validation support, expected behavior with save!, save, etc. (uniqueness validation still in development)
Validatation with create, update, save, and destroy callbacks.
find, create, save, update_attributes, destroy (*.find vs. find!).
where, order_by, skip, limit, each
update, inc, dec
belongs_to, has_many
to_json, to_xml
attr_protected
Scopes
Thread-safe
Polymorphism

Rethinker is licensed under the MIT license, and was forked from NoBrainer before the latter switched to the LGPL.