DataMapper is an Object Relational Mapper. The goal is to create an ORM which is fast, thread-safe and feature rich. To learn a little more about this project and why you should be interested,. Read the Why Datamapper? DataMapper 1.

Active Record DB Adapters activerecord-jdbc-adapter, activerecord-sqlserver-adapter, activerecord-jdbcmysql-adapter, activerecord-jdbcpostgresql-adapter, activerecord-jdbcderby-adapter, and 3 more. Active Record Default Values Default value for and Active record defaults. Active Record Enumerations enumerize, Enumerated attribute, Simple enum, Active Enum, Classy Enum, and 8 more. Pagination will paginate, Kaminari, sorted, ajax pagination, P.