diff --git a/README.md b/README.md
index d3e61c6..ef8b1fe 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 ```
 symfony server:start
+symfony console list make
 symfony console make:migration
 symfony console doctrine:migrations:migrate
 symfony console doctrine:fixtures:load
diff --git a/migrations/Version20220522111615.php b/migrations/Version20220522111615.php
new file mode 100644
index 0000000..b64fe8c
--- /dev/null
+++ b/migrations/Version20220522111615.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20220522111615 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL)');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+        $this->addSql('CREATE TABLE toothbrush1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, brand VARCHAR(255) NOT NULL)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('DROP TABLE toothbrush1');
+    }
+}
diff --git a/migrations/Version20220522115037.php b/migrations/Version20220522115037.php
new file mode 100644
index 0000000..b9080d8
--- /dev/null
+++ b/migrations/Version20220522115037.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20220522115037 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE person2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush2_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, job VARCHAR(255) DEFAULT NULL)');
+        $this->addSql('CREATE INDEX IDX_A387B6D5189073D6 ON person2 (toothbrush2_id)');
+        $this->addSql('CREATE TABLE toothbrush2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, brand VARCHAR(255) NOT NULL)');
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, CONSTRAINT FK_2250E3BCA25DC38 FOREIGN KEY (toothbrush1_id) REFERENCES toothbrush1 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE person2');
+        $this->addSql('DROP TABLE toothbrush2');
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+    }
+}
diff --git a/migrations/Version20220522153147.php b/migrations/Version20220522153147.php
new file mode 100644
index 0000000..c8a45f6
--- /dev/null
+++ b/migrations/Version20220522153147.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20220522153147 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE employee3 (id INTEGER NOT NULL, job VARCHAR(255) NOT NULL, PRIMARY KEY(id))');
+        $this->addSql('CREATE TABLE person3 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush3_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL)');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_D4808643A02C14B3 ON person3 (toothbrush3_id)');
+        $this->addSql('CREATE TABLE toothbrush3 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, brand VARCHAR(255) NOT NULL)');
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, CONSTRAINT FK_2250E3BCA25DC38 FOREIGN KEY (toothbrush1_id) REFERENCES toothbrush1 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+        $this->addSql('DROP INDEX IDX_A387B6D5189073D6');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person2 AS SELECT id, toothbrush2_id, age, name, discr, job FROM person2');
+        $this->addSql('DROP TABLE person2');
+        $this->addSql('CREATE TABLE person2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush2_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, job VARCHAR(255) DEFAULT NULL, CONSTRAINT FK_A387B6D5189073D6 FOREIGN KEY (toothbrush2_id) REFERENCES toothbrush2 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO person2 (id, toothbrush2_id, age, name, discr, job) SELECT id, toothbrush2_id, age, name, discr, job FROM __temp__person2');
+        $this->addSql('DROP TABLE __temp__person2');
+        $this->addSql('CREATE INDEX IDX_A387B6D5189073D6 ON person2 (toothbrush2_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE employee3');
+        $this->addSql('DROP TABLE person3');
+        $this->addSql('DROP TABLE toothbrush3');
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+        $this->addSql('DROP INDEX IDX_A387B6D5189073D6');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person2 AS SELECT id, toothbrush2_id, age, name, discr, job FROM person2');
+        $this->addSql('DROP TABLE person2');
+        $this->addSql('CREATE TABLE person2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush2_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, job VARCHAR(255) DEFAULT NULL)');
+        $this->addSql('INSERT INTO person2 (id, toothbrush2_id, age, name, discr, job) SELECT id, toothbrush2_id, age, name, discr, job FROM __temp__person2');
+        $this->addSql('DROP TABLE __temp__person2');
+        $this->addSql('CREATE INDEX IDX_A387B6D5189073D6 ON person2 (toothbrush2_id)');
+    }
+}
diff --git a/migrations/Version20220522154942.php b/migrations/Version20220522154942.php
new file mode 100644
index 0000000..eeb8160
--- /dev/null
+++ b/migrations/Version20220522154942.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20220522154942 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, CONSTRAINT FK_2250E3BCA25DC38 FOREIGN KEY (toothbrush1_id) REFERENCES toothbrush1 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee3 AS SELECT id, job FROM employee3');
+        $this->addSql('DROP TABLE employee3');
+        $this->addSql('CREATE TABLE employee3 (id INTEGER NOT NULL, job VARCHAR(255) NOT NULL, PRIMARY KEY(id), CONSTRAINT FK_CC5E8290BF396750 FOREIGN KEY (id) REFERENCES person3 (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO employee3 (id, job) SELECT id, job FROM __temp__employee3');
+        $this->addSql('DROP TABLE __temp__employee3');
+        $this->addSql('DROP INDEX IDX_A387B6D5189073D6');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person2 AS SELECT id, toothbrush2_id, age, name, discr, job FROM person2');
+        $this->addSql('DROP TABLE person2');
+        $this->addSql('CREATE TABLE person2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush2_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, job VARCHAR(255) DEFAULT NULL, CONSTRAINT FK_A387B6D5189073D6 FOREIGN KEY (toothbrush2_id) REFERENCES toothbrush2 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO person2 (id, toothbrush2_id, age, name, discr, job) SELECT id, toothbrush2_id, age, name, discr, job FROM __temp__person2');
+        $this->addSql('DROP TABLE __temp__person2');
+        $this->addSql('CREATE INDEX IDX_A387B6D5189073D6 ON person2 (toothbrush2_id)');
+        $this->addSql('DROP INDEX UNIQ_D4808643A02C14B3');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person3 AS SELECT id, toothbrush3_id, age, name, discr FROM person3');
+        $this->addSql('DROP TABLE person3');
+        $this->addSql('CREATE TABLE person3 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush3_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, CONSTRAINT FK_D4808643A02C14B3 FOREIGN KEY (toothbrush3_id) REFERENCES toothbrush3 (id) NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('INSERT INTO person3 (id, toothbrush3_id, age, name, discr) SELECT id, toothbrush3_id, age, name, discr FROM __temp__person3');
+        $this->addSql('DROP TABLE __temp__person3');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_D4808643A02C14B3 ON person3 (toothbrush3_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP INDEX UNIQ_2250E3BCA25DC38');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee1 AS SELECT id, toothbrush1_id, job, age, name FROM employee1');
+        $this->addSql('DROP TABLE employee1');
+        $this->addSql('CREATE TABLE employee1 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush1_id INTEGER DEFAULT NULL, job VARCHAR(255) NOT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL)');
+        $this->addSql('INSERT INTO employee1 (id, toothbrush1_id, job, age, name) SELECT id, toothbrush1_id, job, age, name FROM __temp__employee1');
+        $this->addSql('DROP TABLE __temp__employee1');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_2250E3BCA25DC38 ON employee1 (toothbrush1_id)');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__employee3 AS SELECT id, job FROM employee3');
+        $this->addSql('DROP TABLE employee3');
+        $this->addSql('CREATE TABLE employee3 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, job VARCHAR(255) NOT NULL)');
+        $this->addSql('INSERT INTO employee3 (id, job) SELECT id, job FROM __temp__employee3');
+        $this->addSql('DROP TABLE __temp__employee3');
+        $this->addSql('DROP INDEX IDX_A387B6D5189073D6');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person2 AS SELECT id, toothbrush2_id, age, name, discr, job FROM person2');
+        $this->addSql('DROP TABLE person2');
+        $this->addSql('CREATE TABLE person2 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush2_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL, job VARCHAR(255) DEFAULT NULL)');
+        $this->addSql('INSERT INTO person2 (id, toothbrush2_id, age, name, discr, job) SELECT id, toothbrush2_id, age, name, discr, job FROM __temp__person2');
+        $this->addSql('DROP TABLE __temp__person2');
+        $this->addSql('CREATE INDEX IDX_A387B6D5189073D6 ON person2 (toothbrush2_id)');
+        $this->addSql('DROP INDEX UNIQ_D4808643A02C14B3');
+        $this->addSql('CREATE TEMPORARY TABLE __temp__person3 AS SELECT id, toothbrush3_id, age, name, discr FROM person3');
+        $this->addSql('DROP TABLE person3');
+        $this->addSql('CREATE TABLE person3 (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, toothbrush3_id INTEGER DEFAULT NULL, age INTEGER NOT NULL, name VARCHAR(255) NOT NULL, discr VARCHAR(255) NOT NULL)');
+        $this->addSql('INSERT INTO person3 (id, toothbrush3_id, age, name, discr) SELECT id, toothbrush3_id, age, name, discr FROM __temp__person3');
+        $this->addSql('DROP TABLE __temp__person3');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_D4808643A02C14B3 ON person3 (toothbrush3_id)');
+    }
+}
diff --git a/src/Controller/IndexController.php b/src/Controller/IndexController.php
index 8498bfc..cf901e0 100644
--- a/src/Controller/IndexController.php
+++ b/src/Controller/IndexController.php
@@ -2,6 +2,7 @@
 
 namespace App\Controller;
 
+use Doctrine\ORM\EntityManager;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Annotation\Route;
@@ -12,11 +13,13 @@ class IndexController extends AbstractController
     #[Route('/', name: 'app_index')]
     public function index(Entity1Repository $repo): Response
     {
+        $sm = $repo->getSchemaManager();
         $entity8 = $repo->findOneByName('entity 8');
 
         return $this->render('index/index.html.twig', [
             'controller_name' => 'IndexController',
-            'entity8' => $entity8
+            'entity8' => $entity8,
+            'schemaManager' => $sm
         ]);
     }
 }
diff --git a/src/DataFixtures/InheritanceFixtures.php b/src/DataFixtures/InheritanceFixtures.php
new file mode 100644
index 0000000..c85b10f
--- /dev/null
+++ b/src/DataFixtures/InheritanceFixtures.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\DataFixtures;
+
+use App\Entity\Employee1;
+use App\Entity\Toothbrush1;
+use Doctrine\Bundle\FixturesBundle\Fixture;
+use Doctrine\Persistence\ObjectManager;
+
+class InheritanceFixtures extends Fixture
+{
+    public function load(ObjectManager $manager): void
+    {
+        $e1 = new Employee1();
+        $e1->setJob('peon')->setName('pepito')->setAge(20)->setToothbrush((new Toothbrush1())->setBrand('colgate'));
+        $manager->persist($e1);
+
+        $e1 = new Employee1();
+        $e1->setJob('jefe')->setName('benganito')->setAge(30)->setToothbrush((new Toothbrush1())->setBrand('signal'));
+        $manager->persist($e1);
+
+        $manager->flush();
+    }
+}
+
+// symfony console doctrine:fixtures:load
diff --git a/src/Entity/Employee1.php b/src/Entity/Employee1.php
new file mode 100644
index 0000000..dbfd745
--- /dev/null
+++ b/src/Entity/Employee1.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Employee1 extends Person1
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $job;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Employee1
+     */
+    public function setId(int $id): Employee1
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getJob(): string
+    {
+        return $this->job;
+    }
+
+    /**
+     * @param string $job
+     * @return Employee1
+     */
+    public function setJob(string $job): Employee1
+    {
+        $this->job = $job;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Employee2.php b/src/Entity/Employee2.php
new file mode 100644
index 0000000..5a22219
--- /dev/null
+++ b/src/Entity/Employee2.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Employee2 extends Person2
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $job;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Employee2
+     */
+    public function setId(int $id): Employee2
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getJob(): string
+    {
+        return $this->job;
+    }
+
+    /**
+     * @param string $job
+     * @return Employee2
+     */
+    public function setJob(string $job): Employee2
+    {
+        $this->job = $job;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Employee3.php b/src/Entity/Employee3.php
new file mode 100644
index 0000000..e5dff6e
--- /dev/null
+++ b/src/Entity/Employee3.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Employee3 extends Person3
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $job;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Employee3
+     */
+    public function setId(int $id): Employee3
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getJob(): string
+    {
+        return $this->job;
+    }
+
+    /**
+     * @param string $job
+     * @return Employee3
+     */
+    public function setJob(string $job): Employee3
+    {
+        $this->job = $job;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Person1.php b/src/Entity/Person1.php
new file mode 100644
index 0000000..bc5fdc2
--- /dev/null
+++ b/src/Entity/Person1.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\MappedSuperclass]
+class Person1
+{
+    #[ORM\Column(type: 'integer')]
+    protected int $age;
+
+    #[ORM\Column(type: 'string')]
+    protected string $name;
+
+    #[ORM\OneToOne(targetEntity: 'Toothbrush1', cascade: ['persist'])]
+    #[ORM\JoinColumn(name: 'toothbrush1_id', referencedColumnName: 'id')]
+    protected Toothbrush1 $toothbrush;
+
+    /**
+     * @return int
+     */
+    public function getAge(): int
+    {
+        return $this->age;
+    }
+
+    /**
+     * @param int $age
+     * @return Person1
+     */
+    public function setAge(int $age): Person1
+    {
+        $this->age = $age;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $name
+     * @return Person1
+     */
+    public function setName(string $name): Person1
+    {
+        $this->name = $name;
+        return $this;
+    }
+
+    /**
+     * @return Toothbrush1
+     */
+    public function getToothbrush(): Toothbrush1
+    {
+        return $this->toothbrush;
+    }
+
+    /**
+     * @param Toothbrush1 $toothbrush
+     * @return Person1
+     */
+    public function setToothbrush(Toothbrush1 $toothbrush): Person1
+    {
+        $this->toothbrush = $toothbrush;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Person2.php b/src/Entity/Person2.php
new file mode 100644
index 0000000..83b5fa6
--- /dev/null
+++ b/src/Entity/Person2.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\InheritanceType('SINGLE_TABLE')]
+#[ORM\DiscriminatorColumn(name: 'discr', type: 'string')]
+#[ORM\DiscriminatorMap(['person2' => 'Person2', 'employee2' => 'Employee2'])]
+class Person2
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'integer')]
+    protected int $age;
+
+    #[ORM\Column(type: 'string')]
+    protected string $name;
+
+    #[ORM\OneToOne(targetEntity: 'Toothbrush2', cascade: ['persist'])]
+    #[ORM\JoinColumn(name: 'toothbrush2_id', referencedColumnName: 'id')]
+    protected Toothbrush2 $toothbrush;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Person2
+     */
+    public function setId(int $id): Person2
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return int
+     */
+    public function getAge(): int
+    {
+        return $this->age;
+    }
+
+    /**
+     * @param int $age
+     * @return Person2
+     */
+    public function setAge(int $age): Person2
+    {
+        $this->age = $age;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $name
+     * @return Person2
+     */
+    public function setName(string $name): Person2
+    {
+        $this->name = $name;
+        return $this;
+    }
+
+    /**
+     * @return Toothbrush2
+     */
+    public function getToothbrush(): Toothbrush2
+    {
+        return $this->toothbrush;
+    }
+
+    /**
+     * @param Toothbrush2 $toothbrush
+     * @return Person2
+     */
+    public function setToothbrush(Toothbrush2 $toothbrush): Person2
+    {
+        $this->toothbrush = $toothbrush;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Person3.php b/src/Entity/Person3.php
new file mode 100644
index 0000000..314ab0a
--- /dev/null
+++ b/src/Entity/Person3.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\InheritanceType('JOINED')]
+#[ORM\DiscriminatorColumn(name: 'discr', type: 'string')]
+#[ORM\DiscriminatorMap(['person3' => 'Person3', 'employee3' => 'Employee3'])]
+class Person3
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'integer')]
+    protected int $age;
+
+    #[ORM\Column(type: 'string')]
+    protected string $name;
+
+    #[ORM\OneToOne(targetEntity: 'Toothbrush3', cascade: ['persist'])]
+    #[ORM\JoinColumn(name: 'toothbrush3_id', referencedColumnName: 'id')]
+    protected Toothbrush3 $toothbrush;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Person3
+     */
+    public function setId(int $id): Person3
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return int
+     */
+    public function getAge(): int
+    {
+        return $this->age;
+    }
+
+    /**
+     * @param int $age
+     * @return Person3
+     */
+    public function setAge(int $age): Person3
+    {
+        $this->age = $age;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $name
+     * @return Person3
+     */
+    public function setName(string $name): Person3
+    {
+        $this->name = $name;
+        return $this;
+    }
+
+    /**
+     * @return Toothbrush3
+     */
+    public function getToothbrush(): Toothbrush3
+    {
+        return $this->toothbrush;
+    }
+
+    /**
+     * @param Toothbrush3 $toothbrush
+     * @return Person3
+     */
+    public function setToothbrush(Toothbrush3 $toothbrush): Person3
+    {
+        $this->toothbrush = $toothbrush;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Entity/Toothbrush1.php b/src/Entity/Toothbrush1.php
new file mode 100644
index 0000000..bcf4488
--- /dev/null
+++ b/src/Entity/Toothbrush1.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Toothbrush1
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $brand;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Toothbrush1
+     */
+    public function setId(int $id): Toothbrush1
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getBrand(): string
+    {
+        return $this->brand;
+    }
+
+    /**
+     * @param string $brand
+     * @return Toothbrush1
+     */
+    public function setBrand(string $brand): Toothbrush1
+    {
+        $this->brand = $brand;
+        return $this;
+    }
+
+}
\ No newline at end of file
diff --git a/src/Entity/Toothbrush2.php b/src/Entity/Toothbrush2.php
new file mode 100644
index 0000000..33b8ef6
--- /dev/null
+++ b/src/Entity/Toothbrush2.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Toothbrush2
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $brand;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Toothbrush2
+     */
+    public function setId(int $id): Toothbrush2
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getBrand(): string
+    {
+        return $this->brand;
+    }
+
+    /**
+     * @param string $brand
+     * @return Toothbrush2
+     */
+    public function setBrand(string $brand): Toothbrush2
+    {
+        $this->brand = $brand;
+        return $this;
+    }
+
+}
\ No newline at end of file
diff --git a/src/Entity/Toothbrush3.php b/src/Entity/Toothbrush3.php
new file mode 100644
index 0000000..348e14b
--- /dev/null
+++ b/src/Entity/Toothbrush3.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Toothbrush3
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string')]
+    private string $brand;
+
+    /**
+     * @return int
+     */
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param int $id
+     * @return Toothbrush3
+     */
+    public function setId(int $id): Toothbrush3
+    {
+        $this->id = $id;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getBrand(): string
+    {
+        return $this->brand;
+    }
+
+    /**
+     * @param string $brand
+     * @return Toothbrush3
+     */
+    public function setBrand(string $brand): Toothbrush3
+    {
+        $this->brand = $brand;
+        return $this;
+    }
+
+}
\ No newline at end of file
diff --git a/src/Repository/Entity1Repository.php b/src/Repository/Entity1Repository.php
index f180663..b3edccb 100644
--- a/src/Repository/Entity1Repository.php
+++ b/src/Repository/Entity1Repository.php
@@ -63,4 +63,15 @@ class Entity1Repository extends ServiceEntityRepository
             ->getOneOrNullResult()
         ;
     }
+
+    /**
+     * https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/schema-manager.html
+     *
+     * @return \Doctrine\DBAL\Schema\AbstractSchemaManager|null
+     * @throws \Doctrine\DBAL\Exception
+     */
+    public function getSchemaManager()
+    {
+        return $this->getEntityManager()->getConnection()->getSchemaManager();
+    }
 }
diff --git a/templates/index/index.html.twig b/templates/index/index.html.twig
index 03030a5..5161250 100644
--- a/templates/index/index.html.twig
+++ b/templates/index/index.html.twig
@@ -4,6 +4,11 @@
 
 {% block body %}
 <style>
+    body {
+        background-color: black;
+        color: white;
+        font-family: monospace;
+    }
     .example-wrapper { margin: 1em auto; max-width: 800px; width: 95%; font: 18px/1.5 sans-serif; }
     .example-wrapper code { background: #F5F5F5; padding: 2px 6px; }
 </style>
@@ -18,5 +23,33 @@
     </ul>
 </div>
 
-<p>entity8: {{ entity8.id }}</p>
+    <ul>
+        {% for table in schemaManager.listTables %}
+            <li>
+                {{ table.name }}
+
+                <ul>
+                    {% for column in schemaManager.listTableColumns(table.name) %}
+                        <li>{{ column.name }} ({{ column.type.name }})</li>
+                    {% endfor %}
+
+                    <li>FK
+                        <ul>
+                        {% for fk in schemaManager.listTableForeignKeys(table.name) %}
+                            <li>{{ fk.name ?? '??' }} ({{ fk.columns|join }}) -&gt; {{ fk.getForeignTableName() }}({{ fk.getForeignColumns()|join }})</li>
+                        {% endfor %}
+                        </ul>
+                    </li>
+
+                    <li>IX
+                        <ul>
+                        {% for fk in schemaManager.listTableIndexes(table.name) %}
+                            <li>{{ fk.name }} ({{ fk.columns|join }})</li>
+                        {% endfor %}
+                        </ul>
+                    </li>
+                </ul>
+            </li>
+        {% endfor %}
+    </ul>
 {% endblock %}