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Chronomodel

screenshot of Chronomodel
rails

Temporal PostgreSQL (9.4+) system with "flashback" framework for ActiveRecord (7.0+)

Github

Overview

The ChronoModel is a cutting-edge temporal database system designed for PostgreSQL, revolutionizing how we manage historical data. It brings the functionality similar to Oracle's "Flashback Queries" to users in a more accessible and cost-effective environment. By integrating seamlessly with Ruby on Rails, ChronoModel simplifies the complexities surrounding historical data management, allowing developers to focus on application logic instead of the intricacies of data tracking.

With its unique approach to history-keeping which is embedded directly in the database system, ChronoModel not only maintains the integrity and accuracy of your data but also enriches it with valuable historical context. This is particularly beneficial for applications where data changes frequently and maintaining a record of these changes is crucial.

Features

  • Updatable Views: ChronoModel utilizes updatable views that behave like standard tables for easy integration with database clients, enhancing access to temporal data.

  • INSTEAD OF Triggers: These triggers are employed to redirect data manipulations to the appropriate concrete tables, ensuring that current and historical data are properly managed.

  • Automated Schema Updates: With table inheritance, any updates to the current schema are automatically applied to the history schema, streamlining database management.

  • Squashed History Entries: The system captures multiple data manipulations within the same transaction as a single history entry, reducing clutter and improving historical accuracy.

  • Active Record Integration: Fully compatible with Active Record, ChronoModel decorates migration statements to maintain sync between the data structure and the application's requirements.

  • Optimized Data Extraction: Allows for efficient data retrieval at specific points in time, with JOIN capabilities between temporal and non-temporal data.

  • UTC Timestamps: All timestamps are stored in UTC format, ensuring consistency and avoiding issues surrounding time zone management.

  • Exclusion Constraints: To enhance data integrity, overlapping history is prevented through the use of exclusion constraints, further supporting robust data tracking.

rails
Ruby on Rails

Ruby on Rails, often referred to as Rails, is an open-source web application framework written in Ruby. Known for its convention over configuration and don't repeat yourself (DRY) principles, Rails simplifies and accelerates the development of database-backed web applications.