Hi Sithu, I would still need to a way determine when a record expires. A Boolean wouldn’t help in that regard. But I think this error has something to do with Django’s delete method. The filtering aspect works just fine.
From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On Behalf Of Sithembewena L. Dube Sent: Tuesday, April 16, 2019 2:49 PM To: django-users@googlegroups.com Subject: Re: Unhashable TypeError when deleted from model, Django 2.2 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 <matthew.p...@iss.com<mailto:matthew.p...@iss.com>> 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 django-users+unsubscr...@googlegroups.com<mailto:django-users+unsubscr...@googlegroups.com>. To post to this group, send email to django-users@googlegroups.com<mailto:django-users@googlegroups.com>. 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 django-users+unsubscr...@googlegroups.com<mailto:django-users+unsubscr...@googlegroups.com>. To post to this group, send email to django-users@googlegroups.com<mailto:django-users@googlegroups.com>. 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<https://groups.google.com/d/msgid/django-users/CAH-SnCALGpZGrjVfvkN%2Bt-6Dg6tkX7yW-DhQxyMueTw9rHtqpg%40mail.gmail.com?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 django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. 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/cbdab94a9c2b481bbddb1b242009de80%40iss2.ISS.LOCAL. For more options, visit https://groups.google.com/d/optout.
