text: # Generated by Django 3.0.8 on 2020-07-24 09:05
  
  from django.db import migrations
  
  from pretix.base.channels import get_all_sales_channels
  
  
  def set_sales_channels(apps, schema_editor):
      # We now allow restricting some mails to certain sales channels
      # The default is changing from all channels to "web" only
      # Therefore, for existing events, we enable all sales channels
      Event_SettingsStore = apps.get_model('pretixbase', 'Event_SettingsStore')
      Event = apps.get_model('pretixbase', 'Event')
      all_sales_channels = "[" + ", ".join('"' + sc + '"' for sc in get_all_sales_channels()) + "]"
      batch_size = 1000
      Event_SettingsStore.objects.bulk_create([
          Event_SettingsStore(
              object=event,
              key="mail_sales_channel_placed_paid",
              value=all_sales_channels)
          for event in Event.objects.all()
      ], batch_size=batch_size)
      Event_SettingsStore.objects.bulk_create([
          Event_SettingsStore(
              object=event,
              key="mail_sales_channel_download_reminder",
              value=all_sales_channels)
          for event in Event.objects.all()
      ], batch_size=batch_size)
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('pretixbase', '0158_auto_20200724_0754'),
      ]
  
      operations = [
          migrations.RunPython(set_sales_channels, migrations.RunPython.noop),
      ]
  