#27338: Running an AlterField to change a CharField primary key to AutoField
crashes
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Reporter: Tim Graham | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: Migrations | Version: master
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by Mads Jensen:
Old description:
> For example: change `id = models.CharField(max_length=20,
> primary_key=True)` to `id = models.AutoField(primary_key=True)`. It
> generates this operation:
> {{{
> migrations.AlterField(
> model_name='foo',
> name='id',
> field=models.AutoField(primary_key=True, serialize=False),
> ),
> }}}
> Running it on PostgreSQ gives: `django.db.utils.ProgrammingError:
> operator class "varchar_pattern_ops" does not accept data type integer`.
> I'm not sure if this can be made to work sensibly. Is it possible to
> autopopulate the `AutoField`? I ran into this situation while
> investigating #27267.
New description:
For example: change `id = models.CharField(max_length=20,
primary_key=True)` to `id = models.AutoField(primary_key=True)`. It
generates this operation:
{{{
migrations.AlterField(
model_name='foo',
name='id',
field=models.AutoField(primary_key=True, serialize=False),
),
}}}
Running it on PostgreSQL gives: `django.db.utils.ProgrammingError:
operator class "varchar_pattern_ops" does not accept data type integer`.
I'm not sure if this can be made to work sensibly. Is it possible to
autopopulate the `AutoField`? I ran into this situation while
investigating #27267.
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Ticket URL: <https://code.djangoproject.com/ticket/27338#comment:2>
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