Is get_or_create() thread safe

Question

I have a Django model that can only be accessed using get_or_create(session=session), where session is a foreign key to another Django model.

Since I am

Answer 1

Threading is one problem, but get_or_create is broken for any serious usage in default isolation level of MySQL:

• How do I deal with this race condition in django?
• Why doesn't this loop display an updated object count every five seconds?
• https://code.djangoproject.com/ticket/13906
• http://www.no-ack.org/2010/07/mysql-transactions-and-django.html