django/django — pull request #433 by manfre (2012-10-09 21:17:06+00:00)
Title: Fixed #19096 - More extendable can_return_id_from_insert

RETURNING is an extension of the SQL standard, which is not implemented
the same by all databases. Allow DatabaseOperations.return_insert_id to
return a None to allow for other 3rd party backends with a different
implementation.