Medoco (MongoEngine DOcument COnfigurator) is a web interface and a library for configuring MongoEngine documents via interface GUI or programmable using its library part.
These document classes could be loaded in runtime then from database.
This allows you to provide an interface to the user that will let her to define custom datastructures in runtime that your project can use without restarting, reloading or redeploying your code.
To run Medoco web interface from source change working dir to root folder of the source distribution and run
PYTHONPATH="." ./bin/manage.py runserver. Make sure your have all the requirements installed.