#19384: Managers can no longer be used on abstract models
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Reporter: mhsparks | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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Given the (contrived) models.py
{{{
from django.db import models
class ChoiceManager(models.Manager):
def get_first_choice(self):
return Choice1
class Choice(models.Model):
choice = models.CharField(max_length=200)
votes = models.IntegerField()
choices = ChoiceManager()
class Meta:
abstract = True
class Choice1(Choice):
pass
class Choice2(Choice):
pass
}}}
I get the following error when trying to access
models.Choice.choices.get_first_choice() using 1.5 (master).
{{{
Traceback (most recent call last):
File "/home/mark/venvs/django-14/abstract_managers/demo/tests.py", line
20, in test_abstract_manager
models.Choice.choices.get_first_choice()
File
"/home/mark/venvs/django-15/src/django/django/db/models/manager.py", line
244, in __get__
self.model._meta.object_name,
AttributeError: Manager isn't available; Choice is abstract
}}}
The code runs fine under 1.4.
It appears that this behaviour was changed with this commit:
https://github.com/django/django/commit/cc337a74f1808b216fff96f1695d8b066d2636f6
Relating to this ticket:
https://code.djangoproject.com/ticket/19069
--
Ticket URL: <https://code.djangoproject.com/ticket/19384>
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