Django safedelete (Aktis)

Note

This project is developed by Aktis and was originally forked from https://github.com/makinacorpus/django-safedelete

Note

Our "master" branch is aktis-master

What is it ?

For various reasons, you may want to avoid deleting objects from your database.

This Django application provides an abstract model, that allows you to transparently retrieve or delete your objects, without having them deleted from your database.

You can choose what happens when you delete an object :

• it can be masked from your database (soft delete, the default behavior)
• it can be masked from your database and mask any dependent models. (cascading soft delete)
• it can be normally deleted (hard delete)
• it can be hard-deleted, but if its deletion would delete other objects, it will only be masked
• it can be never deleted or masked from your database (no delete, use with caution)

Example

# imports
from safedelete.models import SafeDeleteModel
from safedelete.models import HARD_DELETE_NOCASCADE

# Models

# We create a new model, with the given policy : Objects will be hard-deleted, or soft deleted if other objects would have been deleted too.
class Article(SafeDeleteModel):
    _safedelete_policy = HARD_DELETE_NOCASCADE

    name = models.CharField(max_length=100)

class Order(SafeDeleteModel):
    _safedelete_policy = HARD_DELETE_NOCASCADE

    name = models.CharField(max_length=100)
    articles = models.ManyToManyField(Article)


# Example of use

>>> article1 = Article(name='article1')
>>> article1.save()

>>> article2 = Article(name='article2')
>>> article2.save()

>>> order = Order(name='order')
>>> order.save()
>>> order.articles.add(article1)

# This article will be masked, but not deleted from the database as it is still referenced in an order.
>>> article1.delete()

# This article will be deleted from the database.
>>> article2.delete()

Note that if you want to add any unique_together constraint to a model you need to add the "deleted" attribute to it otherwise you will get unicity errors with your deleted objects.

Compatibilities

Current branch has been tested with :

• Django 1.11.11 using python 3.6.4

Installation

Installing from github.

-e git+git://github.com/AktisIntelligence/[email protected]#egg=django-safedelete

Add safedelete in your INSTALLED_APPS:

INSTALLED_APPS = [
    'safedelete',
    [...]
]

The application doesn't have any special requirement.

Configuration

In the main django settings you can activate the boolean variable SAFE_DELETE_INTERPRET_UNDELETED_OBJECTS_AS_CREATED. If you do this the update_or_create() function from django's standard manager class will return True for the created variable if the object was soft-deleted and is now "revived".

SAFE_DELETE_ALLOW_FK_TO_SOFT_DELETED_OBJECTS if set to False will raise an integrity error when creating object which uses soft deleted data in ForeignKey field. Defaulted to False.

Documentation

The original package documentation is available here.

Generate your own documentation using:

tox -e docs

Licensing

Please see the LICENSE file.