#27477: Use QuerySet.select_for_update() in admin change form to fix race condition -----------------------------------------+------------------------ Reporter: Dave Hall | Owner: nobody Type: New feature | Status: new Component: contrib.admin | Version: master Severity: Normal | Keywords: admin Triage Stage: Unreviewed | Has patch: 0 Needs documentation: 0 | Needs tests: 0 Patch needs improvement: 0 | Easy pickings: 0 UI/UX: 0 | -----------------------------------------+------------------------ There is a race condition in the admin change form where a user can edit a model instance at the same time as another user. Consider the following two operations occurring in parallel:
1. `ModelAdmin.change_view()` 2. `User.objects.update(is_superuser=True)` If (1) load the model instance, then (2) runs, then (1) saves the model instance, the update in (2) will be lost. The solution is to call `select_for_update` on the queryset in the `changeform_view()` method of `ModelAdmin`. -- Ticket URL: <https://code.djangoproject.com/ticket/27477> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/050.1d790e6dbc86293b2bd5965bd871c270%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.