django/django

from django.db import migrations, models


def add_legacy_name(apps, schema_editor):
    alias = schema_editor.connection.alias
    ContentType = apps.get_model("contenttypes", "ContentType")
    for ct in ContentType.objects.using(alias):
        try:
            ct.name = apps.get_model(ct.app_label, ct.model)._meta.object_name
        except LookupError:
            ct.name = ct.model
        ct.save()


class Migration(migrations.Migration):
    dependencies = [
        ("contenttypes", "0001_initial"),
    ]

    operations = [
        migrations.AlterModelOptions(
            name="contenttype",
            options={
                "verbose_name": "content type",
                "verbose_name_plural": "content types",
            },
        ),
        migrations.AlterField(
            model_name="contenttype",
            name="name",
            field=models.CharField(max_length=100, null=True),
        ),
        migrations.RunPython(
            migrations.RunPython.noop,
            add_legacy_name,
            hints={"model_name": "contenttype"},
        ),
        migrations.RemoveField(
            model_name="contenttype",
            name="name",
        ),
    ]