subject:"RE\: Unhashable TypeError when deleted from model, Django 2.2"

Re: Unhashable TypeError when deleted from model, Django 2.2

2019-04-17 Thread Sithembewena L. Dube

Interesting. Good catch.

Kind regards,
Sithu


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On Wed, Apr 17, 2019 at 9:48 PM Matthew Pava  wrote:

> Okay, the model I’m using specifies an __eq__ function without a
> corresponding __hash__ function. I’ve opened a pull request with the owner
> of that project.
>
>
>
> *From:* django-users@googlegroups.com [mailto:
> django-users@googlegroups.com] *On Behalf Of *Matthew Pava
> *Sent:* Wednesday, April 17, 2019 11:18 AM
> *To:* django-users@googlegroups.com
> *Subject:* RE: Unhashable TypeError when deleted from model, Django 2.2
>
>
>
> 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_campaign=Sent%20with%20Shift%20Signature_medium=Email%20Signature_content=General%20Email%20Group>*
>
>
>
> On Tue, Apr 16, 2019 at 9:29 PM Matthew Pava  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.
> 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/f2d2e610ffe04dff85edf80be0c7ad2d%40iss2.ISS.LOCAL
> <https://groups.google.com/d/msgid/django-users/f2d2e610ffe04dff85edf80be0c7ad2d%40iss2.ISS.LOCAL?utm_medium=email_source=footer>
> .
> For more options, visit https://groups.google.com/d/optout.
>
> --
> You received this message becau

RE: Unhashable TypeError when deleted from model, Django 2.2

2019-04-17 Thread Matthew Pava

Okay, the model I’m using specifies an __eq__ function without a corresponding 
__hash__ function. I’ve opened a pull request with the owner of that project.

From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On 
Behalf Of Matthew Pava
Sent: Wednesday, April 17, 2019 11:18 AM
To: django-users@googlegroups.com
Subject: RE: Unhashable TypeError when deleted from model, Django 2.2

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_campaign=Sent%20with%20Shift%20Signature_medium=Email%20Signature_content=General%20Email%20Group>

On Tue, Apr 16, 2019 at 9:29 PM Matthew Pava 
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'
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You r

RE: Unhashable TypeError when deleted from model, Django 2.2

2019-04-17 Thread Matthew Pava

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_campaign=Sent%20with%20Shift%20Signature_medium=Email%20Signature_content=General%20Email%20Group>

On Tue, Apr 16, 2019 at 9:29 PM Matthew Pava 
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'
--
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Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
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Re: Unhashable TypeError when deleted from model, Django 2.2

2019-04-16 Thread Sithembewena L. Dube

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
*

On Tue, Apr 16, 2019 at 9:29 PM Matthew Pava  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.
> 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/f2d2e610ffe04dff85edf80be0c7ad2d%40iss2.ISS.LOCAL
> 
> .
> For more options, visit https://groups.google.com/d/optout.
>

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For more options, visit https://groups.google.com/d/optout.

Re: Unhashable TypeError when deleted from model, Django 2.2

RE: Unhashable TypeError when deleted from model, Django 2.2

RE: Unhashable TypeError when deleted from model, Django 2.2

Re: Unhashable TypeError when deleted from model, Django 2.2

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