nosql-versioning 0.1.7

Python Library for NoSQL database record versioning

A Python library for NoSQL record versioning.

Installation

To install the latest release on PyPi, simply run:

pip install nosql_versioning

Or to install the latest development version, run:

git clone https://github.com/xinhuang/nosql_versioning.git
cd nosql_versioning
python setup.py install

Quick Tutorial

>>> from nosql_versioning import database
>>>
>>> version, Record = database(decode=json.loads)
>>>
>>> @version()
>>> class Recordv0(object):
>>>     def __init__(self, data):
>>>         self.old_name = data['old_name']
>>>
>>> @version(1)
>>> class Recordv1(object):
>>>     def __init__(self, data=None, value=None):
>>>         if data:
>>>             self.new_name = data['new_name']
>>>         else:
>>>             self.new_name = value
>>>
>>>     @staticmethod
>>>     def migrate(data):
>>>         data['new_name'] = data['old_name']
>>>         del data['old_name']
>>>
>>> rec = Record('{"_ver": 0, "old_name": 1}')
>>> print(rec.new_name)
1
>>> rec = Record(value=42)         # custom constructor can also be used
>>> print(rec.new_name)
42

Licensing

This project is released under the terms of the MIT Open Source License. View LICENSE.txt for more information.