#33614: Django's object creation when using GenericForeignKeys results in
different
ContentType model id's
------------------------------------------------+------------------------
Reporter: Lucas Zocco | Owner: nobody
Type: Bug | Status: new
Component: contrib.contenttypes | Version: 4.0
Severity: Normal | 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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I've created a Document model that has a GenericFK to another model,
however I have noticed that the related_type id is different depending on
how the object is created. It seems to be wrong if done in the manner
explained in the official documentation
(https://docs.djangoproject.com/en/4.0/ref/contrib/contenttypes/#generic-
relations-1) where the object is directly assigned to related_object
instead of creating the GenericForeignKey by setting the related_type and
related_id individually.
A small code snippet to illustrate:
{{{
class Document(BaseModel):
related_id = models.UUIDField(
null=True,
blank=True,
db_index=True,
help_text=("The UUID of the origin model, which this flag came
from."),
)
related_type = models.ForeignKey(
ContentType,
null=True,
blank=True,
on_delete=models.SET_NULL,
help_text="Type that the Subject id relates to",
)
related = GenericForeignKey("related_type", "related_id")
doc1 = Document(data=b'',
related=company)
doc2 = Document(data=b'',
related_type=ContentType.objects.get_for_model(company),
related_id=company.id)
print(ContentType.objects.get_for_model(company).id)
>>> 23
print(doc1.related_type.id)
>>> 148
print(doc2.related_type.id)
>>> 23
}}}
For reference: There's no object with id 148 in the ContentTypes table so
I'm not sure where it's getting it from.
--
Ticket URL: <https://code.djangoproject.com/ticket/33614>
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