#34918: Assigning model instance to `_id`/attname field saves correctly, but
breaks
accessing the field
-------------------------------------+-------------------------------------
Reporter: ricardo- | Owner: nobody
passthrough |
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 |
-------------------------------------+-------------------------------------
Model definition:
{{{#!python
class Author(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4,
editable=False)
class Book(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4,
editable=False)
author = models.ForeignKey(
Author, null=True, blank=True, on_delete=models.CASCADE
)
}}}
{{{#!python
In [1]: book = Book.objects.create()
In [2]: author = Author.objects.create()
In [3]: book.author_id
In [4]: book.author
In [5]: book.author_id = author
In [6]: book.save()
In [7]: book.author
---------------------------------------------------------------------------
KeyError Traceback (most recent call
last)
...
ValidationError: ['“Author object (caaf8f9a-f934-44e9-8e6b-00d71d116acf)”
is not a valid UUID.']
}}}
Similarly, if someone tries to use `book.author_id` to fetch an author
using `Author.objects.get(id=book.author_id)` will also fail with a
similar error.
--
Ticket URL: <https://code.djangoproject.com/ticket/34918>
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