# Generated by Django 3.2.4 on 2021-07-03 08:25 from django.db import migrations, models import django.utils.timezone def copy_created_date(app_registry, schema_editor): db_alias = schema_editor.connection.alias ShelfBook = app_registry.get_model("bookwyrm", "ShelfBook") ShelfBook.objects.all().update(shelved_date=models.F("created_date")) def do_nothing(app_registry, schema_editor): pass class Migration(migrations.Migration): dependencies = [ ("bookwyrm", "0077_auto_20210623_2155"), ] operations = [ migrations.AlterModelOptions( name="shelfbook", options={"ordering": ("-shelved_date",)}, ), migrations.AddField( model_name="shelfbook", name="shelved_date", field=models.DateTimeField(default=django.utils.timezone.now), ), migrations.RunPython(copy_created_date, reverse_code=do_nothing), ]