抽象存储库和@Entity批注继承

Question

I implement a custom EntityRepository in a Symfony2 application.

I have an AbstractEntity (used as parent of some entities) :

/**
 * Abstract Entity.
 *
 * @ORM\Entity(repositoryClass="App\Util\Entity\AbstractRepository")
 */
abstract class AbstractEntity
{
    /**
     * Get id.
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    // ...
}

The custom EntityRepository :

/**
 * Abstract Repository.
 */
class AbstractRepository extends Doctrine\ORM\EntityRepository
{
    /**
     * Handles resource not found from find.
     *
     * @param int $id
     *
     * @return object
     */
    public function findOrFail($id)
    {
        if (null == $entity = $this->find($id)) {
            return $this->fail();
        }

        return $entity;
    }

   //...
}

And one of the entities that extends from AbstractEntity :

/**
 * @ORM\Table(name="tags_sport")
 */
class Tag extends AbstractEntity
{
     // ...
}

The custom repository is declared once in my AbstractEntity using @ORM\\Entity annotation.
I want make my entities use the same repository without redeclare it.

But an error occurs :

Class "App\SportBundle\Entity\Tag" sub class of "App\Util\Entity\AbstractEntity" is not a valid entity or mapped super class

It's caused by the missing @ORM\\Entity annotation in the child entity.

But nothing change.
If I add the @ORM\\Entity annotation in the child entity, it will use the default EntityRepository .

How can I override the default EntityRepository for each entities extending from the AbstractEntity ?

EDIT I accept @Rvanlaak answer thanks to a gist given in the answer comments.
The final solution including the whole custom Repository in this gist

Answer 1

These are two separate things, having an abstract parent entity, and having an abstract parent repository.

By default every entity will use the EntityRepository . The entity can have one repository, which can be defined via the ORM\\Entity annotation: http://symfony.com/doc/current/book/doctrine.html#custom-repository-classes

Let's say you create TagRepository yourself, there will be no problem with extending from your AbstractRepository .

Second, having an abstract entity. This is like telling Doctrine that your entity has a parent class. This isn't possible. The solution for that is to use traits . Found a nice article about that here: http://www.sitepoint.com/using-traits-doctrine-entities/