Why not use a boolean field on the model to denote expires? Then if that field is True, delete the object? I think that would be cheaper and cleaner, especially with lookups.
Kind regards, Sithu *Sent with Shift <https://tryshift.com/?utm_source=SentWithShift&utm_campaign=Sent%20with%20Shift%20Signature&utm_medium=Email%20Signature&utm_content=General%20Email%20Group>* On Tue, Apr 16, 2019 at 9:29 PM Matthew Pava <[email protected]> wrote: > I have a model that has a nullable field called expires. If expires is > null, then the record never expires. > > I’m performing a delete on the model for any record that has an expires > date that has passed, and I keep getting a TypeError that Model is > unhashable. Am I doing something wrong? > > > > Model.objects.filter(expires__lt=timezone.now()).delete() > > > > Here’s the traceback: > > > > Traceback (most recent call last): > > File "\django\core\handlers\exception.py", line 34, in inner > > response = get_response(request) > > File "\django\core\handlers\base.py", line 115, in _get_response > > response = self.process_exception_by_middleware(e, request) > > File "\django\core\handlers\base.py", line 113, in _get_response > > response = wrapped_callback(request, *callback_args, **callback_kwargs) > > File "\django\views\decorators\csrf.py", line 54, in wrapped_view > > return view_func(*args, **kwargs) > > File "\django\views\generic\base.py", line 71, in view > > return self.dispatch(request, *args, **kwargs) > > File "\rest_framework\views.py", line 495, in dispatch > > response = self.handle_exception(exc) > > File "\rest_framework\views.py", line 455, in handle_exception > > self.raise_uncaught_exception(exc) > > File "\rest_framework\views.py", line 492, in dispatch > > response = handler(request, *args, **kwargs) > > File "\rest_framework\decorators.py", line 55, in handler > > return func(*args, **kwargs) > > File "C:\project\general\views.py", line 88, in all_messages_for_user > > Model.objects.filter(expires__lt=timezone.now()).delete() > > File "\django\db\models\query.py", line 710, in delete > > collector.collect(del_query) > > File "\django\db\models\deletion.py", line 192, in collect > > reverse_dependency=reverse_dependency) > > File "\django\db\models\deletion.py", line 94, in add > > if obj not in instances: > > TypeError: unhashable type: 'Model' > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/f2d2e610ffe04dff85edf80be0c7ad2d%40iss2.ISS.LOCAL > <https://groups.google.com/d/msgid/django-users/f2d2e610ffe04dff85edf80be0c7ad2d%40iss2.ISS.LOCAL?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAH-SnCALGpZGrjVfvkN%2Bt-6Dg6tkX7yW-DhQxyMueTw9rHtqpg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
