<?php

// I want to get a Accion Entity by querying

$action = $entityManager->getRepository('Accion')->findOneBy(array('metodo' => 'default','idModule' => 'home'));
?>
// And get this error message
Fatal error:
Uncaught exception 'Doctrine\ORM\Mapping\MappingException' with message 'Class Accion is not a valid entity or mapped super class.'


// DEFINITIONS file accion.class.php //

<?php
/*
*   Accion
*
 * @Table(name="app_acciones")
 * @Entity
 * */
class Accion extends DAO\AppAcciones
{
     /**
     * @var Rol
     *
     * @ManyToMany(targetEntity="Rol", mappedBy="idaccion")
     */
    private $idrol;

    /**
     * @var Module
     *
     * @ManyToOne(targetEntity="Module")
     * @JoinColumns({
     *   @JoinColumn(name="idModule", referencedColumnName="idModule")
     * })
     */
    private $idmodule;


}
?>
     // and AppAcciones.php
<?php

namespace DAO;

/**
 * AppAcciones
 *
 * @MappedSuperclass
 */
class AppAcciones
{
    /**
     * @var integer $idaccion
     *
     * @Column(name="idAccion", type="integer", nullable=false)
     * @Id
     * @GeneratedValue(strategy="IDENTITY")
     */
    private $idaccion;

    /**
     * @var string $metodo
     *
     * @Column(name="metodo", type="string", length=45, nullable=false)
     */
    private $metodo;

    /**
     * @var boolean $activo
     *
     * @Column(name="activo", type="boolean", nullable=false)
     */
    private $activo;

    /**
     * @var string $nombre
     *
     * @Column(name="nombre", type="string", length=45, nullable=false)
     */
    private $nombre;

    /**
     * @var string $descripcion
     *
     * @Column(name="descripcion", type="string", length=200, nullable=false)
     */
    private $descripcion;

    public function __construct()
    {
        $this->idrol = new \Doctrine\Common\Collections\ArrayCollection();
    }

}
?>