0006_alter_somemodel_some_field.py

from django.db import migrations
import third_party_app.generators
import third_party_app.models

def forwards_func(apps, schema_editor):
    """
    Forward migration touches every somemodel.some_field to do some shenanigans.
    """
    pass

class Migration(migrations.Migration):

    dependencies = [
        ('third_party_app', '0005_auto_20211222_2352'),
    ]

    operations = [
        migrations.AlterField(
            model_name='somemodel',
            name='some_field',
            field=third_party_app.models.SomeField(blank=True, db_index=True, default=third_party_app.generators.generate_some_field, help_text='Some field.', max_length=255),
        ),
        migrations.RunPython(forwards_func),
    ]