#32975: ModelAdmin for proxy model with InlineModelAdmin for proxy superclass
reference results in admin.E202
-------------------------------------+-------------------------------------
Reporter: Lucas | Owner: nobody
Weyne |
Type: Bug | Status: new
Component: | Version: 3.1
contrib.admin | Keywords: proxy,
Severity: Normal | InlineModelAdmin, E202
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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This is similar to #30273, but in this case, the `InlineModelAdmin.model`
is a model with references to a proxy superclass
Assume the following Django models:
{{{#!python
class Reporter(models.Model):
name = models.CharField(max_length=50)
class Journalist(Reporter):
class Meta:
proxy = True
class SpecialJournalist(Journalist):
class Meta:
proxy = True
class Article(models.Model):
journalist = models.ForeignKey(Journalist, on_delete=models.CASCADE)
}}}
Register model admins as follows (exemplary):
{{{#!python
class ArticleInline(admin.TabularInline):
model = Article
fk_name = 'reporter'
@admin.register(SpecialJournalist)
class SpecialJournalistAdmin(admin.ModelAdmin):
inlines = [ArticleInline]
}}}
This will result in the following error:
{{{
<class 'ArticleInline'>: (admin.E202) fk_name 'journalist' is not a
ForeignKey to 'SpecialJournalist'.
}}}
This problem occurs on this check this check:
https://github.com/django/django/blob/3.1.13/django/forms/models.py#L1006
A `ValueError` is raised because the result for
`SpecialJournalist._meta.get_parent_list()` does not include `Journalist`:
{{{#!python
>>> SpecialJournalist._meta.get_parent_list()
[<class 'Reporter'>]
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/32975>
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