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django/docs/releases/1.11.16.txt
Michael Sanders 271542dad1 Fixed #29499 -- Fixed race condition in QuerySet.update_or_create().
A race condition happened when the object didn't already exist and
another process/thread created the object before update_or_create()
did and then attempted to update the object, also before update_or_create()
saved the object. The update by the other process/thread could be lost.
2018-08-02 17:07:48 -04:00

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============================
Django 1.11.16 release notes
============================
*Expected September 1, 2018*
Django 1.11.16 fixes a data loss bug in 1.11.15.
Bugfixes
========
* Fixed a race condition in ``QuerySet.update_or_create()`` that could result
in data loss (:ticket:`29499`).