content: import django.contrib.postgres.fields
  import django.contrib.postgres.indexes
  import django.db.models.deletion
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('contenttypes', '0002_remove_content_type_name'),
          ('core', '0017_objectchange_message'),
      ]
  
      operations = [
          # Delete the proxy model from the migration state
          migrations.DeleteModel(
              name='ObjectType',
          ),
          # Create the new concrete model
          migrations.CreateModel(
              name='ObjectType',
              fields=[
                  (
                      'contenttype_ptr',
                      models.OneToOneField(
                          on_delete=django.db.models.deletion.CASCADE,
                          parent_link=True,
                          primary_key=True,
                          serialize=False,
                          to='contenttypes.contenttype',
                          related_name='object_type'
                      )
                  ),
                  (
                      'public',
                      models.BooleanField(
                          default=False
                      )
                  ),
                  (
                      'features',
                      django.contrib.postgres.fields.ArrayField(
                          base_field=models.CharField(max_length=50),
                          default=list,
                          size=None
                      )
                  ),
              ],
              options={
                  'verbose_name': 'object type',
                  'verbose_name_plural': 'object types',
                  'ordering': ('app_label', 'model'),
                  'indexes': [
                      django.contrib.postgres.indexes.GinIndex(
                          fields=['features'],
                          name='core_object_feature_aec4de_gin'
                      ),
                  ]
              },
              bases=('contenttypes.contenttype',),
              managers=[],
          ),
      ]
  