Doctrine doesn't update/generate fields of ManyToOne and OneToMany - symfony

Question

I have a superclass that currently works fine (all relations and properties are updating to the database)
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping\Column;
use Doctrine\ORM\Mapping\Table;
use Doctrine\ORM\Mapping\Entity;
use Doctrine\ORM\Mapping\Id;
use Doctrine\ORM\Mapping\GeneratedValue;
use Doctrine\ORM\Mapping\ManyToOne;
use Doctrine\ORM\Mapping\OneToMany;
use Doctrine\ORM\Mapping\JoinColumn;
use JMS\Serializer\Annotation as JMS;
/**
* Document
*
* #Table(name="document")
* #Entity(repositoryClass="AcmeBundleDocumentRepository")
*/
class Document
{
/**
* #var string
*
* #Column(name="id", type="string")
* #Id
* #GeneratedValue(strategy="UUID")
*/
protected $id;
/**
* #var string
* #Column(name="name", type="string", length=255)
*/
protected $name;
/**
* #var string
* #Column(name="type", type="string", length=255)
*/
protected $type;
/**
* #var boolean
* #Column(name="has_attachments", type="boolean")
*/
protected $hasAttachments;
/**
* #ManyToOne(targetEntity="Delivery")
* #JoinColumn(name="delivery_id", referencedColumnName="id", nullable=false)
* #JMS\Exclude()
*/
protected $delivery;
/**
* #OneToMany(targetEntity="Extension", mappedBy="document", cascade={"persist","remove"})
**/
protected $extensions;
public function __construct()
{
$this->extensions = new ArrayCollection();
}
/* getter and setters */
}
Now I've created a entity called Note that extends to Document entity
use Doctrine\ORM\Mapping\Table;
use Doctrine\ORM\Mapping\Entity;
/**
* Note
*
* #Table(name="note")
* #Entity(repositoryClass="NoteRepository")
*/
class Note extends Document
{
}
I am suppose that the table/entity note should generate the same things of the class that extends. But not do it
I run php bin/console doctrine:schema:update -f
this only generates properties and not FK (foreing Keys), in this case #ManyToOne and #OneToMany.
Additionally maybe help us, i have those entities on the same database
I am doing something wrong ?

Answer 1

As per docs I think you're missing the #MappedSuperclass annotation or you're using Doctrine inheritance in the wrong way. Be aware that a MappedSupperClass is not an entity by itself instead is just a class for share common methods and properties among it is children classes (same inheritance concept that you should already know).
/**
* #MappedSuperclass
*/
class DocumentSuperClass
{
...
}
/**
* #Table(name="document")
* #Entity(repositoryClass="AcmeBundleDocumentRepository")
*/
class Document extends DocumentSuperClass
{
...
}
/**
* #Table(name="note")
* #Entity(repositoryClass="NoteRepository")
*/
class Note extends DocumentSuperClass
{
...
}