from django.db import migrations, models def set_notify_email(apps, schema_editor): Course = apps.get_model("course", "Course") for course in Course.objects.all(): if course.notify_email is None: course.notify_email = course.from_email course.save() class Migration(migrations.Migration): dependencies = [ ('course', '0042_rename_from_email'), ] operations = [ migrations.AddField( model_name='course', name='notify_email', field=models.EmailField(help_text='This email address will receive notifications about the course.', max_length=75, null=True), preserve_default=True, ), migrations.AlterField( model_name='course', name='from_email', field=models.EmailField(help_text="This email address will be used in the 'From' line of automated emails sent by RELATE.", max_length=75), preserve_default=True, ), migrations.RunPython(set_notify_email), ]