new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('sigma_core', '0001_initial'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='Group',
              fields=[
                  ('id', models.AutoField(serialize=False, verbose_name='ID', primary_key=True, auto_created=True)),
                  ('name', models.CharField(max_length=254)),
                  ('visibility', models.SmallIntegerField(choices=[(0, 'PUBLIC'), (1, 'PRIVATE')], default=1)),
                  ('membership_policy', models.SmallIntegerField(choices=[(0, 'ANYONE'), (1, 'REQUEST'), (2, 'INVITATION')], default=2)),
                  ('validation_policy', models.SmallIntegerField(choices=[(0, 'ADMINS'), (1, 'MEMBERS')], default=0)),
                  ('type', models.SmallIntegerField(choices=[(0, 'BASIC'), (1, 'CURSUS/DEPARTMENT'), (2, 'ASSOCIATION'), (3, 'PROMOTION'), (4, 'SCHOOL')], default=0)),
              ],
          ),
      ]
  
subject: Add migration file