#31124: Model.get_FOO_display() does not work correctly with inherited choices.
-------------------------------------+-------------------------------------
Reporter: Yash Jhunjhunwala | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: 2.2
(models, ORM) |
Severity: Normal | Resolution: needsinfo
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Old description:
> Given a base model with choices A containing 3 tuples
> Child Model inherits the base model overrides the choices A and adds 2
> more tuples
> get_foo_display does not work correctly for the new tuples added
New description:
Given a base model with choices A containing 3 tuples
Child Model inherits the base model overrides the choices A and adds 2
more tuples
get_foo_display does not work correctly for the new tuples added
Example:
{{{
class A(models.Model):
foo_choice = Choices(("A","output1"),("B","output2"))
field_foo = models.CharField(max_length=254,choices=foo_choice)
class Meta:
abstract:True
class B(A):
foo_choice = Choices(("A","output1"),("B","output2"),("C","output3"))
field_foo = models.CharField(max_length=254,choices=foo_choice)
}}}
Upon invoking get_field_foo_display() on instance of B ,
For value "A" and "B" the output works correctly i.e. returns "output1" /
"output2"
but for value "C" the method returns "C" and not "output3" which is the
expected behaviour
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Comment (by Yash Jhunjhunwala):
Replying to [comment:1 felixxm]:
> Thanks for this report. Can you provide models and describe expected
behavior? Can you also check if it's not a duplicate of #30931?, that was
fixed in Django 2.2.7.
--
Ticket URL: <https://code.djangoproject.com/ticket/31124#comment:2>
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