new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.9.6 on 2016-05-31 20:35
  from __future__ import unicode_literals
  
  from django.db import migrations
  
  
  def timestamp_export(apps, schema_editor):
      Export = apps.get_model("excerptexport", "Export")  # noqa
      for export in Export.objects.filter(updated_at__isnull=True):
          export.updated_at = export.created_at
          export.save()
  
  
  def reverse_timestamp_export(apps, schema_editor):
      # no need for reversing this, but easier if a backwards migration exists
      pass
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('excerptexport', '0040_merge'),
      ]
  
      operations = [
          migrations.RunPython(timestamp_export, reverse_timestamp_export)
      ]
  
subject: add migration that sets he updated_at time to created_time