old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('contenttypes', '0001_initial'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='Confirmation',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('object_id', models.PositiveIntegerField()),
                  ('date_sent', models.DateTimeField(verbose_name='sent')),
                  ('confirmation_key', models.CharField(max_length=40, verbose_name='activation key')),
                  ('content_type', models.ForeignKey(to='contenttypes.ContentType')),
              ],
              options={
                  'verbose_name': 'confirmation email',
                  'verbose_name_plural': 'confirmation emails',
              },
              bases=(models.Model,),
          ),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('contenttypes', '0001_initial'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='Confirmation',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('object_id', models.PositiveIntegerField()),
                  ('date_sent', models.DateTimeField(verbose_name='sent')),
                  ('confirmation_key', models.CharField(max_length=40, verbose_name='activation key')),
                  ('content_type', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType')),
              ],
              options={
                  'verbose_name': 'confirmation email',
                  'verbose_name_plural': 'confirmation emails',
              },
              bases=(models.Model,),
          ),
      ]
  
subject: Add on_delete in foreign keys.