#31531: Loaddata fixtures with UUID as primary key
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Reporter: max13fr | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 3.0
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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Hello,
I have an issue with Django 3. I use an UUID field as primary key. When
I'm reloading fixtures, I got the error "UNIQUE constraint failed:
api_test.id".
It's seem that loaddata not detecting if the primary key already existing
in DB so instead of an update, it tries to insert again the line with the
same primary key.
I'm wondering if the issue doesn't come from the lack of dash in the
database (sqlite) : "724ea59910a249a1be2fc1fcb04d003e" instead of
"724ea599-10a2-49a1-be2f-c1fcb04d003e".
Important note : I converted the default id field to UUID with in a
specific migration (but the table was empty), I don't know if it can also
be the source of the issue.
Here the example:
api/models.py :
{{{
class Model Test(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4,
editable=False)
name = models.CharField(max_length=100)
}}}
api/fixtures/initial_data.json :
{{{
{
"model": "api.Test",
"pk": "724ea599-10a2-49a1-be2f-c1fcb04d003e",
"fields": {
"name": "Test 1"
}
}, {
"model": "api.Test",
"pk": "6bcb72f0-099b-416d-8b2c-fcd0bef76cbf",
"fields": {
"name": "Test 2"
}
}
}}}
{{{
python manage.py loaddata initial_data
}}}
{{{
django.db.utils.IntegrityError: Problem installing fixture
'api/fixtures/initial_data.json': Could not load
api.Test(pk=724ea599-10a2-49a1-be2f-c1fcb04d003e): UNIQUE constraint
failed: api_test.id
}}}
Thanks in advance
Max
--
Ticket URL: <https://code.djangoproject.com/ticket/31531>
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