#26223: Squashing migrations with preserve_default=False keeps the default
--------------------------------+--------------------
Reporter: bartekwojcicki | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
--------------------------------+--------------------
I have a migration with AlterField with default value provided and
preserve_default=False. When I squash it, I got a CreateModel operation
with default value for this field set.
Steps to reproduce:
1. Create a model, make migrations.
{{{
#!div style="font-size: 80%"
{{{#!python
class FooBar(models.Model):
pass
}}}
}}}
2. Add field without default, make migrations, provide a one-off default.
{{{
#!div style="font-size: 80%"
{{{#!python
class FooBar(models.Model):
foo = models.TextField()
}}}
}}}
3. Squash migrations.
Squashed migrations keeps the default in CreateModel operation.
{{{
#!div style="font-size: 80%"
{{{#!python
operations = [
migrations.CreateModel(
name='FooBar',
fields=[
('id', models.AutoField(auto_created=True,
primary_key=True, serialize=False, verbose_name='ID')),
('foo', models.TextField(default='bar')),
],
),
]
}}}
}}}
Running makemigrations again creates a migration with AlterField, removing
the default
{{{
#!div style="font-size: 80%"
{{{#!python
operations = [
migrations.AlterField(
model_name='foobar',
name='foo',
field=models.TextField(),
),
]
}}}
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/26223>
Django <https://code.djangoproject.com/>
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