#34796: Deleting child table does not delete columns in parent table when using
multi-table inheritance
-------------------------------------+-------------------------------------
Reporter: Stephen | Owner: nobody
Finucane |
Type: Bug | Status: new
Component: Database | Version: 4.2
layer (models, ORM) |
Severity: Normal | Keywords:
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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I am aware that we don't use database-level cascades (ticket:21961) but I
expected this to be implemented by Django in Python, given the docs
(https://docs.djangoproject.com/en/4.2/topics/db/models/#multi-table-
inheritance) say that the automatically-created `OneToOneField` on the
child model will have `on_delete=models.CASCADE`.
{{{
place_ptr = models.OneToOneField(
Place,
on_delete=models.CASCADE,
parent_link=True,
primary_key=True,
)
}}}
I have produced a reproducer which I will provide a link to shortly. In
summary though, you simply need to create a table using multi-table
inheritance and then delete that table. While the child table will be
deleted, the corresponding rows in the parent table will remain,
--
Ticket URL: <https://code.djangoproject.com/ticket/34796>
Django <https://code.djangoproject.com/>
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