#35950: Fix refreshing of related fields when one field is deferred
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Reporter: Adam | Owner: Adam Johnson
Johnson |
Type: Bug | Status: assigned
Component: Database | Version: 5.1
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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In #35044, we fixed the issue where loading a deferred field would clear
related objects.
But it left a bug where refreshing all fields explicitly with
`refresh_from_db()` would no longer clear related objects *if* the model
instance had any deferred fields.
This would work on Django 5.0 but is broken on 5.1:
{{{
book = Book.objects.defer('title').get(pk=1)
assert book.author is not None # fetch related object
Author.objects.all().delete()
book.refresh_from_db()
assert book.author is None # should have been reset by the refresh
}}}
Fix incoming.
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Ticket URL: <https://code.djangoproject.com/ticket/35950>
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