old_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.11.13 on 2018-07-05 17:57
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  from django.apps import apps
  from django.db.models import F
  
  from django.db.backends.postgresql_psycopg2.schema import DatabaseSchemaEditor
  from django.db.migrations.state import StateApps
  
  def copy_email_field(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
      UserProfile = apps.get_model('zerver', 'UserProfile')
      UserProfile.objects.all().update(delivery_email=F('email'))
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('zerver', '0173_support_seat_based_plans'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='userprofile',
              name='delivery_email',
              field=models.EmailField(db_index=True, default='', max_length=254),
              preserve_default=False,
          ),
          migrations.RunPython(copy_email_field,
                               reverse_code=migrations.RunPython.noop),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.11.13 on 2018-07-05 17:57
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  from django.apps import apps
  from django.db.models import F
  
  from django.db.backends.postgresql_psycopg2.schema import DatabaseSchemaEditor
  from django.db.migrations.state import StateApps
  
  def copy_email_field(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
      UserProfile = apps.get_model('zerver', 'UserProfile')
      UserProfile.objects.all().update(delivery_email=F('email'))
  
  
  class Migration(migrations.Migration):
      atomic = False
  
      dependencies = [
          ('zerver', '0173_support_seat_based_plans'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='userprofile',
              name='delivery_email',
              field=models.EmailField(db_index=True, default='', max_length=254),
              preserve_default=False,
          ),
          migrations.RunPython(copy_email_field,
                               reverse_code=migrations.RunPython.noop),
      ]
  
subject: Disable atomic for delivery_email migration.