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Django Datapurge

Simple app to help purging old data like sesions, nonces, logs etc.. It's like django-admin.py clearsessions command but gives you possibility to purge anything. Simpliest way to use datapurge is to run management command (manually or via cron):

python manage.py purge

It's easy to integrate datapurge with celery or kronos. Just wrap datapurge.actions.purge function with code corresponding to your task backend and run it the way you want.

Requirements

  • Python (2.6, 2.7, 3.4, 3.5)
  • Django>=1.3.7

Installation

Install from PyPI using pip:

pip install django-datapurge

Or clone this repo:

git clone git@github.com:swistakm/django-datapurge.git

Add 'datapurge' to your INSTALLED_APPS setting.

INSTALLED_APPS = (
    ...
    'datapurge',
)

Configuration

Add DATAPURGE_MODELS to your settings file and specify which models should be purged:

DATAPURGE_MODELS = {
    'app_name.ModelName1': {
        # policy settings
        ...
        },
    'app_name.ModelName2': {
        ...
        },
}

Available purge policies

There are a few available policies for your use. Use what you find most convienient. Policy is guessed from set parameters provided.

ExpireFieldPolicy

Deletes all objects which expire_field datetime is older than timezone.now().

Parameters:

  • 'expire_field' - name of datetime field holding expiration date

Example:

DATAPURGE_MODELS = {
    "sessions.Session": {
        "expire_field": "expire_date",
    }
}

LifetimePolicy

Deletes all objects which are older than specified lifetime

Parameters:

  • 'lifetime' - timedelta object specifying maximum lifetime of object
  • 'created_field' - name of datetime field holding object creation time

Example:

from timezone import timedelta

DATAPURGE_MODELS = {
    "oauth_provider.Nonce": {
        "lifetime": timedelta(seconds=300),
        "created_field": "timestamp",
    }

CallablePolicy

Deletes all objects from query returned by provided callable

Parameters:

  • 'callable' - function accepting model class and returning QuerySet

Example:

DATAPURGE_MODELS = {
    "some_app.Log": {
        "callable": lambda model: model.objects.all(),
    }

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Simple Django app for managing data retention.

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