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: [email protected] [mailto:[email protected]] On Behalf Of Sithembewena L. Dube Sent: Tuesday, April 16, 2019 2:49 PM To: [email protected] 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 <[email protected]<mailto:[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]<mailto:[email protected]>. To post to this group, send email to [email protected]<mailto:[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]<mailto:[email protected]>. To post to this group, send email to [email protected]<mailto:[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<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 [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/cbdab94a9c2b481bbddb1b242009de80%40iss2.ISS.LOCAL. For more options, visit https://groups.google.com/d/optout.
