Skip to main content

Optimistic lock implementation for Django. Prevents users from doing concurrent editing.

Project description

django-concurrency is an optimistic lock [1] implementation for Django.

Supported Django versions: 1.8.x, 1.9.x, 1.10.x., 1.11.x

It prevents users from doing concurrent editing in Django both from UI and from a django command.

How it works

sample code:

from django.db import models
from concurrency.fields import IntegerVersionField

class ConcurrentModel( models.Model ):
    version = IntegerVersionField( )
    name = models.CharField(max_length=100)

Now if you try:

a = ConcurrentModel.objects.get(pk=1) = '1'

b = ConcurrentModel.objects.get(pk=1) = '2'

you will get a RecordModifiedError on

Similar projects

Other projects that handle concurrent editing are django-optimistic-lock and django-locking anyway concurrency is “a batteries included” optimistic lock management system, here some features not available elsewhere:

  • can be applied to any model; not only your code (ie. django.contrib.auth.Group)
  • handle list-editable ChangeList. (handle #11313)
  • manage concurrency conflicts in admin’s actions
  • can intercept changes performend out of the django app (ie using pgAdmin, phpMyAdmin, Toads) (using TriggerVersionField)
  • can be disabled if needed (see disable_concurrency)
  • ConditionalVersionField to handle complex business rules

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
django-concurrency-1.4.tar.gz (61.4 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page