# Generated by Django 4.0.4 on 2022-04-27 18:30 from django.db import migrations, models def forwards(apps, schema_editor): BasketItem = apps.get_model("purchase", "BasketItem") # noqa: N806 items = ( BasketItem.objects.using(schema_editor.connection.alias) .all() .select_related("product") ) for item in items: item.unit_price_cents = item.product.unit_price_cents BasketItem.objects.bulk_update(items, ["unit_price_cents"]) class Migration(migrations.Migration): dependencies = [ ("purchase", "0005_alter_basket_options_alter_basketitem_options_and_more"), ] operations = [ migrations.AddField( model_name="basketitem", name="unit_price_cents", field=models.PositiveIntegerField( help_text="product's unit price in cents at the time of purchase", null=True, verbose_name="unit price (cents)", ), ), migrations.RunPython(forwards, migrations.RunPython.noop), ]