#34058: Widening AutoField to BigAutoField, fails to widen the sequence.
-------------------------------------+-------------------------------------
Reporter: Anders Kaseorg | Owner: Mariusz
| Felisiak
Type: Bug | Status: closed
Component: Database layer | Version: 4.1
(models, ORM) |
Severity: Release blocker | Resolution: fixed
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Anders Kaseorg):
I found a scenario in which this fix doesn’t work: if the field had been
renamed before the upgrade, the corresponding sequence will not have been
renamed.
To modify my above reproduction recipe, insert a new step between steps 3
and 4 renaming the field:
{{{
#!python
# my_app/models.py
from django.db import models
class Widget(models.Model):
renamed_id = models.SmallAutoField(primary_key=True)
}}}
{{{
#!console
$ ./manage.py makemigrations
Was widget.id renamed to widget.renamed_id (a SmallAutoField)? [y/N] y
Migrations for 'my_app':
my_app/migrations/0002_rename_id_widget_renamed_id.py
- Rename field id on widget to renamed_id
$ ./manage.py migrate
Operations to perform:
Apply all migrations: my_app
Running migrations:
Applying my_app.0002_rename_id_widget_renamed_id... OK
}}}
(and then keep the new name in step 5).
--
Ticket URL: <https://code.djangoproject.com/ticket/34058#comment:7>
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