Removed.

sandbox/data/fixtures/contact.yml

----
-Contact: 
-  Contact_1: 
-    name: Jonathan H. Wage

sandbox/data/fixtures/user.yml

----
-User: 
-  User_1: 
-    username: jonwage
-    hair_color: brown
-    Contact: Contact_1

sandbox/migrations/008_add_self_reference.class.php

-<?php
-/**
- * This class has been auto-generated by the Doctrine ORM Framework
- */
-class AddSelfReference extends Doctrine_Migration
-{
-	public function up()
-	{
-		$this->createTable('self_reference', array (
-  'id' => 
-  array (
-    'primary' => true,
-    'autoincrement' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'name' => 
-  array (
-    'type' => 'string',
-    'length' => 255,
-  ),
-  'user_id1' => 
-  array (
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'user_id2' => 
-  array (
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'parent_self_reference_id' => 
-  array (
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'parent_self_reference_id2' => 
-  array (
-    'type' => 'integer',
-    'length' => 11,
-  ),
-), array (
-  'indexes' => 
-  array (
-  ),
-  'primary' => 
-  array (
-    0 => 'id',
-  ),
-));
-	}
-
-	public function down()
-	{
-		$this->dropTable('self_reference');
-	}
-}
\ No newline at end of file

sandbox/migrations/009_add_user.class.php

-<?php
-/**
- * This class has been auto-generated by the Doctrine ORM Framework
- */
-class AddUser extends Doctrine_Migration
-{
-	public function up()
-	{
-		$this->createTable('user', array (
-  'id' => 
-  array (
-    'primary' => true,
-    'autoincrement' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'username' => 
-  array (
-    'type' => 'string',
-    'length' => 255,
-  ),
-  'hair_color' => 
-  array (
-    'type' => 'string',
-    'length' => 255,
-  ),
-  'contact_id' => 
-  array (
-    'type' => 'integer',
-    'length' => 11,
-  ),
-), array (
-  'indexes' => 
-  array (
-    'name_x' => 
-    array (
-      'fields' => 
-      array (
-        'username' => 
-        array (
-          'sorting' => 'ASC',
-          'length' => '11',
-          'primary' => true,
-        ),
-      ),
-      'type' => 'unique',
-    ),
-  ),
-  'primary' => 
-  array (
-    0 => 'id',
-  ),
-));
-	}
-
-	public function down()
-	{
-		$this->dropTable('user');
-	}
-}
\ No newline at end of file

sandbox/migrations/010_add_user_car.class.php

-<?php
-/**
- * This class has been auto-generated by the Doctrine ORM Framework
- */
-class AddUserCar extends Doctrine_Migration
-{
-	public function up()
-	{
-		$this->createTable('user_car', array (
-  'user_id' => 
-  array (
-    'primary' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'car_id' => 
-  array (
-    'primary' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-), array (
-  'indexes' => 
-  array (
-  ),
-  'primary' => 
-  array (
-    0 => 'user_id',
-    1 => 'car_id',
-  ),
-));
-	}
-
-	public function down()
-	{
-		$this->dropTable('user_car');
-	}
-}
\ No newline at end of file

sandbox/migrations/011_add_user_group.class.php

-<?php
-/**
- * This class has been auto-generated by the Doctrine ORM Framework
- */
-class AddUserGroup extends Doctrine_Migration
-{
-	public function up()
-	{
-		$this->createTable('user_group', array (
-  'user_id' => 
-  array (
-    'primary' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-  'group_id' => 
-  array (
-    'primary' => true,
-    'type' => 'integer',
-    'length' => 11,
-  ),
-), array (
-  'indexes' => 
-  array (
-  ),
-  'primary' => 
-  array (
-    0 => 'user_id',
-    1 => 'group_id',
-  ),
-));
-	}
-
-	public function down()
-	{
-		$this->dropTable('user_group');
-	}
-}
\ No newline at end of file

sandbox/migrations/012_apply_foreign_key_constraints.class.php

-<?php
-/**
- * This class has been auto-generated by the Doctrine ORM Framework
- */
-class ApplyForeignKeyConstraints extends Doctrine_Migration
-{
-	public function up()
-	{
-		$this->createForeignKey('adult', array (
-  'local' => 'contact_id',
-  'foreign' => 'id',
-  'foreignTable' => 'contact',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'adult_contact_contact_id_id',
-));		$this->createForeignKey('child', array (
-  'local' => 'adult_id',
-  'foreign' => 'id',
-  'foreignTable' => 'adult',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'child_adult_adult_id_id',
-));		$this->createForeignKey('dog', array (
-  'local' => 'user_id',
-  'foreign' => 'id',
-  'foreignTable' => 'user',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'dog_user_user_id_id',
-));		$this->createForeignKey('self_reference', array (
-  'local' => 'user_id1',
-  'foreign' => 'id',
-  'foreignTable' => 'user',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'self_reference_user_user_id1_id',
-));		$this->createForeignKey('self_reference', array (
-  'local' => 'user_id2',
-  'foreign' => 'id',
-  'foreignTable' => 'user',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'self_reference_user_user_id2_id',
-));		$this->createForeignKey('self_reference', array (
-  'local' => 'parent_self_reference_id',
-  'foreign' => 'id',
-  'foreignTable' => 'self_reference',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'self_reference_self_reference_parent_self_reference_id_id',
-));		$this->createForeignKey('self_reference', array (
-  'local' => 'parent_self_reference_id2',
-  'foreign' => 'id',
-  'foreignTable' => 'self_reference',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'self_reference_self_reference_parent_self_reference_id2_id',
-));		$this->createForeignKey('user', array (
-  'local' => 'contact_id',
-  'foreign' => 'id',
-  'foreignTable' => 'contact',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'user_contact_contact_id_id',
-));		$this->createForeignKey('user_car', array (
-  'local' => 'user_id',
-  'foreign' => 'id',
-  'foreignTable' => 'user',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'user_car_user_user_id_id',
-));		$this->createForeignKey('user_car', array (
-  'local' => 'car_id',
-  'foreign' => 'id',
-  'foreignTable' => 'car',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'user_car_car_car_id_id',
-));		$this->createForeignKey('user_group', array (
-  'local' => 'user_id',
-  'foreign' => 'id',
-  'foreignTable' => 'user',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'user_group_user_user_id_id',
-));		$this->createForeignKey('user_group', array (
-  'local' => 'group_id',
-  'foreign' => 'id',
-  'foreignTable' => 'groups',
-  'onUpdate' => NULL,
-  'onDelete' => NULL,
-  'name' => 'user_group_groups_group_id_id',
-));
-	}
-
-	public function down()
-	{
-		$this->dropForeignKey('adult', 'adult_contact_contact_id_id');
-		$this->dropForeignKey('child', 'child_adult_adult_id_id');
-		$this->dropForeignKey('dog', 'dog_user_user_id_id');
-		$this->dropForeignKey('self_reference', 'self_reference_user_user_id1_id');
-		$this->dropForeignKey('self_reference', 'self_reference_user_user_id2_id');
-		$this->dropForeignKey('self_reference', 'self_reference_self_reference_parent_self_reference_id_id');
-		$this->dropForeignKey('self_reference', 'self_reference_self_reference_parent_self_reference_id2_id');
-		$this->dropForeignKey('user', 'user_contact_contact_id_id');
-		$this->dropForeignKey('user_car', 'user_car_user_user_id_id');
-		$this->dropForeignKey('user_car', 'user_car_car_car_id_id');
-		$this->dropForeignKey('user_group', 'user_group_user_user_id_id');
-		$this->dropForeignKey('user_group', 'user_group_groups_group_id_id');
-
-	}
-}
\ No newline at end of file