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A base model class for adding version information and preventing concurrent modifications

Project Description

django-model-versions

A library for adding version information to models. This version information is then used to prevent concurrent modifications. E.g.

>>> b1 = Blog.objects.get(id=1)
>>> b2 = Blog.objects.get(id=1) # Same row as b1
>>> b1.title = 'Some blog'
>>> b1.save()
>>> b2.title = 'Some other blog'
>>> b2.save()

Will result in a ConcurrentModificationException being raised instead of overriding the data saved by b1.

Usage

Subclass modelversions.VersionedModel instead of django.db.models.Model. That’s it!

Known flaws

objects.update(…) will not increment the version number for objects altered. This would be better as a mixin. object.delete() will not check versioning Django admin hates it

Author

Colin Howe <colin@colinhowe.co.uk> http://www.colinhowe.co.uk - @colinhowe

Release History

Release History

This version
History Node

0.4.0

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
django-model-versions-0.4.0.linux-x86_64.tar.gz (5.6 kB) Copy SHA256 Checksum SHA256 any Dumb Binary Sep 15, 2015
django-model-versions-0.4.0.tar.gz (3.4 kB) Copy SHA256 Checksum SHA256 Source Sep 15, 2015

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