content: import django.db.models.deletion
  import taggit.managers
  from django.db import migrations, models
  
  import utilities.fields
  import utilities.json
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('circuits', '0049_natural_ordering'),
          ('dcim', '0196_qinq_svlan'),
          ('extras', '0122_charfield_null_choices'),
          ('tenancy', '0016_charfield_null_choices'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='VirtualCircuitType',
              fields=[
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('created', models.DateTimeField(auto_now_add=True, null=True)),
                  ('last_updated', models.DateTimeField(auto_now=True, null=True)),
                  ('custom_field_data', models.JSONField(
                      blank=True,
                      default=dict,
                      encoder=utilities.json.CustomFieldJSONEncoder
                  )),
                  ('name', models.CharField(max_length=100, unique=True)),
                  ('slug', models.SlugField(max_length=100, unique=True)),
                  ('description', models.CharField(blank=True, max_length=200)),
                  ('color', utilities.fields.ColorField(blank=True, max_length=6)),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
              ],
              options={
                  'verbose_name': 'virtual circuit type',
                  'verbose_name_plural': 'virtual circuit types',
                  'ordering': ('name',),
              },
          ),
          migrations.CreateModel(
              name='VirtualCircuit',
              fields=[
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('created', models.DateTimeField(auto_now_add=True, null=True)),
                  ('last_updated', models.DateTimeField(auto_now=True, null=True)),
                  (
                      'custom_field_data',
                      models.JSONField(blank=True, default=dict, encoder=utilities.json.CustomFieldJSONEncoder),
                  ),
                  ('description', models.CharField(blank=True, max_length=200)),
                  ('comments', models.TextField(blank=True)),
                  ('cid', models.CharField(max_length=100)),
                  ('status', models.CharField(default='active', max_length=50)),
                  (
                      'provider_account',
                      models.ForeignKey(
                          blank=True,
                          null=True,
                          on_delete=django.db.models.deletion.PROTECT,
                          related_name='virtual_circuits',
                          to='circuits.provideraccount',
                      ),
                  ),
                  (
                      'provider_network',
                      models.ForeignKey(
                          on_delete=django.db.models.deletion.PROTECT,
                          related_name='virtual_circuits',
                          to='circuits.providernetwork',
                      ),
                  ),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
                  (
                      'type',
                      models.ForeignKey(
                          on_delete=django.db.models.deletion.PROTECT,
                          related_name='virtual_circuits',
                          to='circuits.virtualcircuittype'
                      )
                  ),
                  (
                      'tenant',
                      models.ForeignKey(
                          blank=True,
                          null=True,
                          on_delete=django.db.models.deletion.PROTECT,
                          related_name='virtual_circuits',
                          to='tenancy.tenant',
                      ),
                  ),
              ],
              options={
                  'verbose_name': 'circuit',
                  'verbose_name_plural': 'circuits',
                  'ordering': ['provider_network', 'provider_account', 'cid'],
              },
          ),
          migrations.CreateModel(
              name='VirtualCircuitTermination',
              fields=[
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('created', models.DateTimeField(auto_now_add=True, null=True)),
                  ('last_updated', models.DateTimeField(auto_now=True, null=True)),
                  (
                      'custom_field_data',
                      models.JSONField(blank=True, default=dict, encoder=utilities.json.CustomFieldJSONEncoder),
                  ),
                  ('role', models.CharField(default='peer', max_length=50)),
                  ('description', models.CharField(blank=True, max_length=200)),
                  (
                      'interface',
                      models.OneToOneField(
                          on_delete=django.db.models.deletion.CASCADE,
                          related_name='virtual_circuit_termination',
                          to='dcim.interface',
                      ),
                  ),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
                  (
                      'virtual_circuit',
                      models.ForeignKey(
                          on_delete=django.db.models.deletion.CASCADE,
                          related_name='terminations',
                          to='circuits.virtualcircuit',
                      ),
                  ),
              ],
              options={
                  'verbose_name': 'virtual circuit termination',
                  'verbose_name_plural': 'virtual circuit terminations',
                  'ordering': ['virtual_circuit', 'role', 'pk'],
              },
          ),
          migrations.AddConstraint(
              model_name='virtualcircuit',
              constraint=models.UniqueConstraint(
                  fields=('provider_network', 'cid'), name='circuits_virtualcircuit_unique_provider_network_cid'
              ),
          ),
          migrations.AddConstraint(
              model_name='virtualcircuit',
              constraint=models.UniqueConstraint(
                  fields=('provider_account', 'cid'), name='circuits_virtualcircuit_unique_provideraccount_cid'
              ),
          ),
      ]
  