django-kvstore: A Python repository from Say Media

An extensible key-value store backend for Django applications.

This module provides an abstraction layer for accessing a key-value storage.

Configuring your key-value store is a matter of adding a statement in this form to your Django settings module:

KEY_VALUE_STORE_BACKEND = 'scheme://store?parameters'

Where scheme is one of the following, persistent stores:

db (local table accessed through Django's database connection)
googleappengine (Google AppEngine data store)
sdb (Amazon SimpleDB)
tokyotyrant (Tokyo Tyrant)
redis (Redis)

And some non-persistent stores, provided mainly for testing purposes:

locmem
memcached

store and parameters varies from one backend to another. Refer to the documentation included in each backend implementation for further details.

You can define a django_kvstore-backed custom model, in a fashion similar to Django models (although it does not support querying, except by primary key lookup).

Here's an example of a custom model class using django_kvstore:

from django_kvstore import models

class MyData(models.Model):
    my_key = models.Field(pk=True)
    foo = models.Field()
    bar = models.Field()

Typical usage for such a model:

key = "something_unique"
data = MyData.get(key)
if data is None:
    data = MyData(my_key=key)
    data.foo = "foo"
    data.bar = "bar"
    data.save()

and deletion:

key = "something_unique"
data = MyData.get(key)
if data is not None:
    data.delete()

saymedia/django-kvstore