Django Concurrency


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django-concurrency is an optimistic locking library for Django Models

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

How it works


django-concurrency works adding a concurrency.fields.VersionField to each model, each time a record is saved the version number changes (the algorithm used depends on the implementation of concurrency.fields.VersionField used (see Fields).

Each update is converted in the following SQL clause like:

UPDATE mymodel SET version=NEW_VERSION, ... WHERE id = PK AND version = VERSION_NUMBER

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