#27742: Unexpected migration on Parent -> child model inheritence
-----------------------------------------+------------------------
Reporter: Anthony King | Owner: nobody
Type: Bug | Status: new
Component: Uncategorized | Version: 1.11
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 |
-----------------------------------------+------------------------
After upgrading to 1.11, migrations are generated on unchanged fields for
parent pointers.
models.py
{{{#!python
class Parent(models.Model):
pass
class Child(Parent):
pass
}}}
initial_migration.py
{{{#!python
# -*- coding: utf-8 -*-
# Generated by Django 1.10.5 on 2017-01-18 11:06
from __future__ import unicode_literals
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
dependencies = [
('app', '0263_previous_migration'),
]
operations = [
migrations.CreateModel(
name='Parent',
fields=[
('id', models.AutoField(auto_created=True,
primary_key=True, serialize=False, verbose_name='ID')),
],
),
migrations.CreateModel(
name='Child',
fields=[
('parent_ptr', models.OneToOneField(auto_created=True,
on_delete=django.db.models.deletion.CASCADE, parent_link=True,
primary_key=True, serialize=False, to='app.Parent')),
],
bases=('app.parent',),
),
]
}}}
post upgrade migration.py
{{{#!python
# -*- coding: utf-8 -*-
# Generated by Django 1.11a1 on 2017-01-18 11:06
from __future__ import unicode_literals
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
dependencies = [
('app', '0264_child_parent'),
]
operations = [
migrations.AlterField(
model_name='child',
name='parent_ptr',
field=models.OneToOneField(auto_created=True,
on_delete=django.db.models.deletion.CASCADE, parent_link=True,
primary_key=True, to='app.Parent'),
),
]
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/27742>
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