ruby_event_store-active_record (rubygems): Persistent event repository implementation for RubyEventStore based on ActiveRecord. Ships with database schema and migrations suitable for PostgreSQL, MySQL ans SQLite database engines.  Includes repository implementation with linearized writes to achieve log-like properties of streams on top of SQL database engine. 
Keywords: aggregate-root|cqrs|cqrs-es|ddd|domain-driven-design|event-driven|event-driven-architecture|event-sourcing|rails|ruby