John Davidson

Message:

Given the following entity hierachy:

// in main project src/Entity

#[ORM\Entity]

class Article extends AbstractArticle

// in bundle src/Entity/Content

#[ORM\MappedSuperclass]

abstract class AbstractArticle extends AbstractEntity

// in bundle src/Entity

#[ORM\MappedSuperclass]

abstract class AbstractEntity implements NormalizableInterface, EntityInterface

And this configuration:

orm:

    auto_generate_proxy_classes: true

    naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware

    auto_mapping: true

    mappings:

        App:

            is_bundle: false

            type: annotation

            dir: '%kernel.project_dir%/src/Entity'

            prefix: 'App\Entity'

            alias: App

        XyBundle:

            is_bundle: true

            type: annotation

            dir: 'Entity'

            prefix: 'XyBundle\Entity'

            alias: Xy

I'm getting this error:

Class "App\Entity\Article" sub class of "XyBundle\Entity\Content\AbstractArticle" is not a valid entity or mapped super class.

I want to instantiate one or more different articles of the abstract article in the future. Yet, this configuration works if and only if I put #[ORM\Entity] to the AbstractArticle class.

What am I doing wrong here?

---

My Answer:
php
// src/Entity/BaseEntity.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\MappedSuperclass
*/
class BaseEntity
{
/**
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
* @ORM\Column(type="integer")
*/
protected $id;

// other common properties and methods
}


php
// src/Entity/User.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\Entity
*/
class User extends BaseEntity
{
/**
* @ORM\Column(type="string")
*/
private $username;

// other user-specific properties and methods
}


php
// src/Entity/Admin.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\Entity
*/
class Admin extends User
{
/**
* @ORM\Column(type="string")
*/
private $role;

// other admin-specific properties and methods
}


php
// src/Entity/Manager.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\Entity
*/
class Manager extends User
{
/**
* @ORM\Column(type="string")
*/
private $department;

// other manager-specific properties and methods
}


php
// src/Entity/Employee.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\Entity
*/
class Employee extends User
{
/**
* @ORM\Column(type="string")
*/
private $position;

// other employee-specific properties and methods
}


In this hierarchy, `User` is a subclass of `BaseEntity`, and `Admin`, `Manager`, and `Employee` are subclasses of `User`. Each subclass adds specific properties and methods.

When using Doctrine, make sure to properly configure the mapping annotations in each entity class to define the database schema. Also, ensure that the entity classes are correctly located in the `src/Entity` directory of your project.