content: import django.db.models.deletion
  import mptt.fields
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('dcim', '0189_moduletype_rack_airflow'),
          ('extras', '0121_customfield_related_object_filter'),
      ]
  
      operations = [
          migrations.AlterModelOptions(
              name='modulebaytemplate',
              options={'ordering': ('device_type', 'module_type', '_name')},
          ),
          migrations.RemoveConstraint(
              model_name='modulebay',
              name='dcim_modulebay_unique_device_name',
          ),
          migrations.AddField(
              model_name='modulebay',
              name='level',
              field=models.PositiveIntegerField(default=0, editable=False),
              preserve_default=False,
          ),
          migrations.AddField(
              model_name='modulebay',
              name='lft',
              field=models.PositiveIntegerField(default=0, editable=False),
              preserve_default=False,
          ),
          migrations.AddField(
              model_name='modulebay',
              name='module',
              field=models.ForeignKey(
                  blank=True,
                  null=True,
                  on_delete=django.db.models.deletion.CASCADE,
                  related_name='%(class)ss',
                  to='dcim.module',
              ),
          ),
          migrations.AddField(
              model_name='modulebay',
              name='parent',
              field=mptt.fields.TreeForeignKey(
                  blank=True,
                  editable=False,
                  null=True,
                  on_delete=django.db.models.deletion.CASCADE,
                  related_name='children',
                  to='dcim.modulebay',
              ),
          ),
          migrations.AddField(
              model_name='modulebay',
              name='rght',
              field=models.PositiveIntegerField(default=0, editable=False),
              preserve_default=False,
          ),
          migrations.AddField(
              model_name='modulebay',
              name='tree_id',
              field=models.PositiveIntegerField(db_index=True, default=0, editable=False),
              preserve_default=False,
          ),
          migrations.AddField(
              model_name='modulebaytemplate',
              name='module_type',
              field=models.ForeignKey(
                  blank=True,
                  null=True,
                  on_delete=django.db.models.deletion.CASCADE,
                  related_name='%(class)ss',
                  to='dcim.moduletype',
              ),
          ),
          migrations.AlterField(
              model_name='modulebaytemplate',
              name='device_type',
              field=models.ForeignKey(
                  blank=True,
                  null=True,
                  on_delete=django.db.models.deletion.CASCADE,
                  related_name='%(class)ss',
                  to='dcim.devicetype',
              ),
          ),
          migrations.AddConstraint(
              model_name='modulebay',
              constraint=models.UniqueConstraint(
                  fields=('device', 'module', 'name'), name='dcim_modulebay_unique_device_module_name'
              ),
          ),
          migrations.AddConstraint(
              model_name='modulebaytemplate',
              constraint=models.UniqueConstraint(
                  fields=('module_type', 'name'), name='dcim_modulebaytemplate_unique_module_type_name'
              ),
          ),
      ]
  