erezarnon / cleanerversion

CleanerVersion adds a versioning/historizing layer to your relational DB which implements a "Slowly Changing Dimensions Type 2" behavior

CleanerVersion for Django

Abstract

CleanerVersion is a solution that allows you to read and write multiple versions of an entry to and from your relational database. It allows to keep track of modifications on an object over time, as described by the theory of Slowly Changing Dimensions (SCD) - Type 2.

CleanerVersion therefore enables a Django-based Datawarehouse, which was the initial idea of this package.

Features

CleanerVersion's feature-set includes the following bullet points:

• Simple versioning of an object (according to SCD, Type 2)
  • Retrieval of the current version of the object
  • Retrieval of an object's state at any point in time
• Versioning of One-to-Many relationships
  • For any point in time, retrieval of correct related objects
• Versioning of Many-to-Many relationships
  • For any point in time, retrieval of correct related objects
• Migrations, if using in conjunction with Django 1.7 and upwards

Prerequisites

This code was tested with the following technical components

• Python 2.7 & 3.4
• Django 1.6 & 1.7
• PostgreSQL 9.3.4 & SQLite3

Documentation

Find a detailed documentation at http://cleanerversion.readthedocs.org/.

Feature requests

• Querying for time ranges