#29260: Django makes an extra UPDATE query when custom PK is evaluating before save. -------------------------------------+------------------------------------- Reporter: user0007 | Owner: nobody Type: Bug | Status: new Component: Database layer | Version: 2.0 (models, ORM) | Severity: Normal | Resolution: Keywords: | Triage Stage: | Unreviewed Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+-------------------------------------
Comment (by Simon Charette): > A fix might try to detect if the primary key came from a default and if so, skip the update. I think we could use some kind of `self._state.adding and self._meta.pk.default` heuristics to automatically set `force_insert=True` on the last table/leaf child. That would break the following scenario though. {{{#!python a = Account(pk='known-uuid-pk') a.title = new_title a.save() # expects an UPDATE here. }}} But I would argue that `force_update` should be passed in this case. That wouldn't solve the MTI issue described in #29129 but that would do for this case. -- Ticket URL: <https://code.djangoproject.com/ticket/29260#comment:3> 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/066.b636e671f6e23a74a2cae56a6ff38f86%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.