old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  import django.utils.timezone
  from django.conf import settings
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('account', '0001_initial'),
          migrations.swappable_dependency(settings.AUTH_USER_MODEL),
      ]
  
      operations = [
          migrations.CreateModel(
              name='InvitationStat',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('invites_sent', models.IntegerField(default=0)),
                  ('invites_allocated', models.IntegerField(default=0)),
                  ('invites_accepted', models.IntegerField(default=0)),
                  ('user', models.OneToOneField(to=settings.AUTH_USER_MODEL)),
              ],
              options={
              },
              bases=(models.Model,),
          ),
          migrations.CreateModel(
              name='JoinInvitation',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('message', models.TextField(null=True)),
                  ('sent', models.DateTimeField(default=django.utils.timezone.now)),
                  ('status', models.IntegerField(choices=[(1, b'Sent'), (2, b'Accepted'), (3, b'Joined Independently')])),
                  ('from_user', models.ForeignKey(related_name='invites_sent', to=settings.AUTH_USER_MODEL)),
                  ('signup_code', models.OneToOneField(to='account.SignupCode')),
                  ('to_user', models.ForeignKey(related_name='invites_received', to=settings.AUTH_USER_MODEL, null=True)),
              ],
              options={
              },
              bases=(models.Model,),
          ),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  import django.utils.timezone
  from django.conf import settings
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('account', '0001_initial'),
          migrations.swappable_dependency(settings.AUTH_USER_MODEL),
      ]
  
      operations = [
          migrations.CreateModel(
              name='InvitationStat',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('invites_sent', models.IntegerField(default=0)),
                  ('invites_allocated', models.IntegerField(default=0)),
                  ('invites_accepted', models.IntegerField(default=0)),
                  ('user', models.OneToOneField(to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE)),
              ],
              options={
              },
              bases=(models.Model,),
          ),
          migrations.CreateModel(
              name='JoinInvitation',
              fields=[
                  ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                  ('message', models.TextField(null=True)),
                  ('sent', models.DateTimeField(default=django.utils.timezone.now)),
                  ('status', models.IntegerField(choices=[(1, b'Sent'), (2, b'Accepted'), (3, b'Joined Independently')])),
                  ('from_user', models.ForeignKey(related_name='invites_sent', to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE)),
                  ('signup_code', models.OneToOneField(to='account.SignupCode', on_delete=models.CASCADE)),
                  ('to_user', models.ForeignKey(related_name='invites_received', to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True)),
              ],
              options={
              },
              bases=(models.Model,),
          ),
      ]
  on_delete will be a required arg for ForeignKey/OneToOneField in Django 2.0
subject: Add `on_delete` to initial migrations