#30044: F expressions don't work with MTI
-------------------------------------+-------------------------------------
Reporter: Tom Carrick | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 2.1
(models, ORM) |
Severity: Normal | Resolution:
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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Comment (by Simon Charette):
This looks like #14104 (Allow joined field in `F()`s) in disguise because
in the case of MTI `F('date_x')` actually translates to
`F('parent_ptr__date_x')`.
I assume you get a `FieldError('Joined field references are not permitted
in this query')` error if you pass `F('parent_ptr__date_x')`?
If you do I assume we could keep this PR opened as a cleanup to raise the
same error on inherited fields since they require a join.
Adding support `update()` through joins is being revisited in #25643.
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Ticket URL: <https://code.djangoproject.com/ticket/30044#comment:1>
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