old_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.9.13 on 2018-05-07 16:20
  from __future__ import unicode_literals
  
  import django.contrib.postgres.fields.jsonb
  from django.db import migrations
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('councilmatic_core', '0040_mediaevent_meta'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='event',
              name='extras',
              field=django.contrib.postgres.fields.jsonb.JSONField(default=dict),
          ),
          migrations.RunSQL('''
              UPDATE councilmatic_core_event
                SET extras = jsonb_build_object('guid', guid)
                WHERE guid IS NOT NULL
          ''', reverse_sql='''
              UPDATE councilmatic_core_event
                SET guid = extras->'guid'
                WHERE extras->'guid' IS NOT NULL
          '''),
          migrations.RemoveField(
              model_name='event',
              name='guid',
          ),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.9.13 on 2018-05-07 16:20
  from __future__ import unicode_literals
  
  import django.contrib.postgres.fields.jsonb
  from django.db import migrations
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('councilmatic_core', '0040_mediaevent_meta'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='event',
              name='extras',
              field=django.contrib.postgres.fields.jsonb.JSONField(default=dict),
          ),
          migrations.RunSQL('''
              UPDATE councilmatic_core_event
                SET extras = json_build_object('guid', guid)
                WHERE guid IS NOT NULL
          ''', reverse_sql='''
              UPDATE councilmatic_core_event
                SET guid = extras->'guid'
                WHERE extras->'guid' IS NOT NULL
          '''),
          migrations.RemoveField(
              model_name='event',
              name='guid',
          ),
      ]
  
subject: Use json_build_object, rather than jsonb_build_object