content: import django.db.models.deletion
  from django.conf import settings
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('contenttypes', '0002_remove_content_type_name'),
          ('core', '0010_gfk_indexes'),
          migrations.swappable_dependency(settings.AUTH_USER_MODEL),
      ]
  
      operations = [
          migrations.SeparateDatabaseAndState(
              state_operations=[
                  migrations.CreateModel(
                      name='ObjectChange',
                      fields=[
                          ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                          ('time', models.DateTimeField(auto_now_add=True, db_index=True)),
                          ('user_name', models.CharField(editable=False, max_length=150)),
                          ('request_id', models.UUIDField(db_index=True, editable=False)),
                          ('action', models.CharField(max_length=50)),
                          ('changed_object_id', models.PositiveBigIntegerField()),
                          ('related_object_id', models.PositiveBigIntegerField(blank=True, null=True)),
                          ('object_repr', models.CharField(editable=False, max_length=200)),
                          ('prechange_data', models.JSONField(blank=True, editable=False, null=True)),
                          ('postchange_data', models.JSONField(blank=True, editable=False, null=True)),
                          (
                              'changed_object_type',
                              models.ForeignKey(
                                  on_delete=django.db.models.deletion.PROTECT,
                                  related_name='+',
                                  to='contenttypes.contenttype',
                              ),
                          ),
                          (
                              'related_object_type',
                              models.ForeignKey(
                                  blank=True,
                                  null=True,
                                  on_delete=django.db.models.deletion.PROTECT,
                                  related_name='+',
                                  to='contenttypes.contenttype',
                              ),
                          ),
                          (
                              'user',
                              models.ForeignKey(
                                  blank=True,
                                  null=True,
                                  on_delete=django.db.models.deletion.SET_NULL,
                                  related_name='changes',
                                  to=settings.AUTH_USER_MODEL,
                              ),
                          ),
                      ],
                      options={
                          'verbose_name': 'object change',
                          'verbose_name_plural': 'object changes',
                          'ordering': ['-time'],
                          'indexes': [
                              models.Index(
                                  fields=['changed_object_type', 'changed_object_id'],
                                  name='core_object_changed_c227ce_idx',
                              ),
                              models.Index(
                                  fields=['related_object_type', 'related_object_id'],
                                  name='core_object_related_3375d6_idx',
                              ),
                          ],
                      },
                  ),
              ],
              # Table has been renamed from 'extras' app
              database_operations=[],
          ),
      ]
  