content: import django.db.models.deletion
  import mptt.fields
  import taggit.managers
  from django.db import migrations, models
  
  import utilities.json
  
  
  class Migration(migrations.Migration):
      replaces = [
          ('tenancy', '0002_tenant_ordering'),
          ('tenancy', '0003_contacts'),
          ('tenancy', '0004_extend_tag_support'),
          ('tenancy', '0005_standardize_id_fields'),
          ('tenancy', '0006_created_datetimefield'),
          ('tenancy', '0007_contact_link'),
          ('tenancy', '0008_unique_constraints'),
          ('tenancy', '0009_standardize_description_comments'),
          ('tenancy', '0010_tenant_relax_uniqueness'),
          ('tenancy', '0011_contactassignment_tags'),
      ]
  
      dependencies = [
          ('extras', '0002_squashed_0059'),
          ('contenttypes', '0002_remove_content_type_name'),
          ('tenancy', '0001_squashed_0012'),
      ]
  
      operations = [
          migrations.AlterModelOptions(
              name='tenant',
              options={'ordering': ['name']},
          ),
          migrations.CreateModel(
              name='ContactRole',
              fields=[
                  ('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),
                  ),
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('name', models.CharField(max_length=100, unique=True)),
                  ('slug', models.SlugField(max_length=100, unique=True)),
                  ('description', models.CharField(blank=True, max_length=200)),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
              ],
              options={
                  'ordering': ('name',),
              },
          ),
          migrations.CreateModel(
              name='ContactGroup',
              fields=[
                  ('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),
                  ),
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('name', models.CharField(max_length=100)),
                  ('slug', models.SlugField(max_length=100)),
                  ('description', models.CharField(blank=True, max_length=200)),
                  ('lft', models.PositiveIntegerField(editable=False)),
                  ('rght', models.PositiveIntegerField(editable=False)),
                  ('tree_id', models.PositiveIntegerField(db_index=True, editable=False)),
                  ('level', models.PositiveIntegerField(editable=False)),
                  (
                      'parent',
                      mptt.fields.TreeForeignKey(
                          blank=True,
                          null=True,
                          on_delete=django.db.models.deletion.CASCADE,
                          related_name='children',
                          to='tenancy.contactgroup',
                      ),
                  ),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
              ],
              options={
                  'ordering': ['name'],
                  'unique_together': set(),
              },
          ),
          migrations.CreateModel(
              name='Contact',
              fields=[
                  ('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),
                  ),
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('name', models.CharField(max_length=100)),
                  ('title', models.CharField(blank=True, max_length=100)),
                  ('phone', models.CharField(blank=True, max_length=50)),
                  ('email', models.EmailField(blank=True, max_length=254)),
                  ('address', models.CharField(blank=True, max_length=200)),
                  ('comments', models.TextField(blank=True)),
                  (
                      'group',
                      models.ForeignKey(
                          blank=True,
                          null=True,
                          on_delete=django.db.models.deletion.SET_NULL,
                          related_name='contacts',
                          to='tenancy.contactgroup',
                      ),
                  ),
                  ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
                  ('link', models.URLField(blank=True)),
              ],
              options={
                  'ordering': ['name'],
                  'unique_together': set(),
              },
          ),
          migrations.AddField(
              model_name='tenantgroup',
              name='tags',
              field=taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag'),
          ),
          migrations.AlterField(
              model_name='tenant',
              name='id',
              field=models.BigAutoField(auto_created=True, primary_key=True, serialize=False),
          ),
          migrations.AlterField(
              model_name='tenantgroup',
              name='id',
              field=models.BigAutoField(auto_created=True, primary_key=True, serialize=False),
          ),
          migrations.AlterField(
              model_name='tenant',
              name='created',
              field=models.DateTimeField(auto_now_add=True, null=True),
          ),
          migrations.AlterField(
              model_name='tenantgroup',
              name='created',
              field=models.DateTimeField(auto_now_add=True, null=True),
          ),
          migrations.CreateModel(
              name='ContactAssignment',
              fields=[
                  ('created', models.DateTimeField(auto_now_add=True, null=True)),
                  ('last_updated', models.DateTimeField(auto_now=True, null=True)),
                  ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('object_id', models.PositiveBigIntegerField()),
                  ('priority', models.CharField(blank=True, max_length=50)),
                  (
                      'contact',
                      models.ForeignKey(
                          on_delete=django.db.models.deletion.PROTECT, related_name='assignments', to='tenancy.contact'
                      ),
                  ),
                  (
                      'content_type',
                      models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='contenttypes.contenttype'),
                  ),
                  (
                      'role',
                      models.ForeignKey(
                          on_delete=django.db.models.deletion.PROTECT,
                          related_name='assignments',
                          to='tenancy.contactrole',
                      ),
                  ),
              ],
              options={
                  'ordering': ('priority', 'contact'),
                  'unique_together': set(),
              },
          ),
          migrations.AddConstraint(
              model_name='contact',
              constraint=models.UniqueConstraint(fields=('group', 'name'), name='tenancy_contact_unique_group_name'),
          ),
          migrations.AddConstraint(
              model_name='contactassignment',
              constraint=models.UniqueConstraint(
                  fields=('content_type', 'object_id', 'contact', 'role'),
                  name='tenancy_contactassignment_unique_object_contact_role',
              ),
          ),
          migrations.AddConstraint(
              model_name='contactgroup',
              constraint=models.UniqueConstraint(
                  fields=('parent', 'name'), name='tenancy_contactgroup_unique_parent_name'
              ),
          ),
          migrations.AddField(
              model_name='contact',
              name='description',
              field=models.CharField(blank=True, max_length=200),
          ),
          migrations.AlterField(
              model_name='tenant',
              name='name',
              field=models.CharField(max_length=100),
          ),
          migrations.AlterField(
              model_name='tenant',
              name='slug',
              field=models.SlugField(max_length=100),
          ),
          migrations.AddConstraint(
              model_name='tenant',
              constraint=models.UniqueConstraint(
                  fields=('group', 'name'),
                  name='tenancy_tenant_unique_group_name',
                  violation_error_message='Tenant name must be unique per group.',
              ),
          ),
          migrations.AddConstraint(
              model_name='tenant',
              constraint=models.UniqueConstraint(
                  condition=models.Q(('group__isnull', True)), fields=('name',), name='tenancy_tenant_unique_name'
              ),
          ),
          migrations.AddConstraint(
              model_name='tenant',
              constraint=models.UniqueConstraint(
                  fields=('group', 'slug'),
                  name='tenancy_tenant_unique_group_slug',
                  violation_error_message='Tenant slug must be unique per group.',
              ),
          ),
          migrations.AddConstraint(
              model_name='tenant',
              constraint=models.UniqueConstraint(
                  condition=models.Q(('group__isnull', True)), fields=('slug',), name='tenancy_tenant_unique_slug'
              ),
          ),
          migrations.AddField(
              model_name='contactassignment',
              name='tags',
              field=taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag'),
          ),
      ]
  