id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
9581	Race condition in Model.save() with non-automatic unique indexes	hfaber@…	nobody	"The current Model.save() implementation transparently handles updating of records vs. insertion of new records.
It first tries to update an existing record and if it fails it will do an insert instead.

This can lead to a race condition when between the failed update and the subsequent insert another process successfully inserts an object with the same primary key (or other field with unique index). For automatically generated primary keys (e.g. auto-inc IDs) this is not a problem. But for manually-set PKs (or other unique fields) this will lead to a key integrity violation."		closed	Database layer (models, ORM)	1.0		invalid			Unreviewed	0	0	0	0	0	0