django-hierarkey -- Hierarchical key-value store This package allows you to attach a key-value store to a model, e.g. to store preferences of an user or a customer. The package supports arbitrary datatypes, defaults and model hierarchies, i.e. you can define a different model instance as your instance's parent and the values of the parent instance will be used as default values for the child instances. This approach has been in use in pretix for quite a while, so it has been tested in production. This project is maintained by Raphael Michel . See the AUTHORS file for a list of all the awesome folks who contributed to this project. WWW: https://github.com/raphaelm/django-hierarkey