#34523: Model.objects.update_or_create method sometimes raises
TransactionManagementError
-------------------------------------+-------------------------------------
Reporter: gatello-s | Owner: Mariusz
| Felisiak
Type: Bug | Status: closed
Component: Database layer | Version: 4.2
(models, ORM) |
Severity: Normal | Resolution: fixed
Keywords: update_or_create | Triage Stage: Accepted
TransactionManagementError |
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by GitHub <noreply@…>):
* status: assigned => closed
* resolution: => fixed
Comment:
In [changeset:"83339d2103f447377fedb3bd145b52c3ef2b667c" 83339d21]:
{{{
#!CommitTicketReference repository=""
revision="83339d2103f447377fedb3bd145b52c3ef2b667c"
Fixed #34523 -- Fixed TransactionManagementError in
QuerySet.update_or_create() with MyISAM storage engine.
QuerySet.update_or_create() uses nested atomic to handle possible
integrity errors taking savepoints as way to mark back the connection
as usable. Savepoints are not returned when
uses_savepoints/can_release_savepoints feature flags are set to False.
As a consequence, QuerySet.update_or_create() assumed the outer atomic
block is tainted and raised TransactionManagementError.
This commit partly reverts 331a460f8f2e4f447b68fba491464b68c9b21fd1.
Thanks gatello-s for the report.
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/34523#comment:19>
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