content: import django.db.models.deletion
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('ipam', '0074_vlantranslationpolicy_vlantranslationrule'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='vlan',
              name='qinq_role',
              field=models.CharField(blank=True, max_length=50, null=True),
          ),
          migrations.AddField(
              model_name='vlan',
              name='qinq_svlan',
              field=models.ForeignKey(
                  blank=True,
                  null=True,
                  on_delete=django.db.models.deletion.PROTECT,
                  related_name='qinq_cvlans',
                  to='ipam.vlan',
              ),
          ),
          migrations.AddConstraint(
              model_name='vlan',
              constraint=models.UniqueConstraint(fields=('qinq_svlan', 'vid'), name='ipam_vlan_unique_qinq_svlan_vid'),
          ),
          migrations.AddConstraint(
              model_name='vlan',
              constraint=models.UniqueConstraint(fields=('qinq_svlan', 'name'), name='ipam_vlan_unique_qinq_svlan_name'),
          ),
      ]
  