old_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.10.3 on 2016-12-12 13:25
  from __future__ import unicode_literals
  
  from django.db import migrations
  from django.utils.text import slugify
  
  
  def create_slugs(apps, schema_editor):
      Value = apps.get_model('product', 'AttributeChoiceValue')
      for value in Value.objects.all():
          value.slug = slugify(value.display)
          value.save()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('product', '0017_attributechoicevalue_slug'),
      ]
  
      operations = [
          migrations.RunPython(create_slugs),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.10.3 on 2016-12-12 13:25
  from __future__ import unicode_literals
  
  from django.db import migrations
  from django.utils.text import slugify
  
  
  def create_slugs(apps, schema_editor):
      Value = apps.get_model('product', 'AttributeChoiceValue')
      for value in Value.objects.all():
          value.slug = slugify(value.display)
          value.save()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('product', '0017_attributechoicevalue_slug'),
      ]
  
      operations = [
          migrations.RunPython(create_slugs, migrations.RunPython.noop),
      ]
  
subject: Allow to revert data migaration