new_contents: # Generated by Django 2.0.13 on 2019-05-13 22:09
  
  from django.db import migrations
  
  
  def migrate_messages_to_feedback(apps, schema_editor):
      """
      Migrate symposion.reviews.models.ProposalMessage to
      conf_site.reviews.models.ProposalFeedback.
      """
      ProposalMessage = apps.get_model("symposion_reviews", "ProposalMessage")
      ProposalFeedback = apps.get_model("reviews", "ProposalFeedback")
      # There are unlikely to be so many ProposalMessage objects
      # that it would make sense to use `.iterator()` here.
      for message in ProposalMessage.objects.all():
          ProposalFeedback.objects.create(
              proposal=message.proposal.proposal,
              author=message.user,
              comment=message.message,
              comment_html=message.message_html,
          )
  
  
  
  
  class Migration(migrations.Migration):
  
      dependencies = [("symposion_reviews", "0001_initial")]
  
      operations = [migrations.RunPython(migrate_messages_to_feedback)]
  
subject: Migrate old proposal messages to new feedback.