Doctrine does not map its own generated entity - symfony

Question

I'm trying to learn Doctrine.
I'm trying to update my database with the last generated entity.
I generated the entity with doctrine:generate:entity
here it is:
<?php
namespace NRtworks\ChartOfAccountsBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Lasttest
*
* #ORM\Table()
* #ORM\Entity
*/
class Lasttest
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return Lasttest
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
}
?>
So basic stuff, I did not change anything.
Then I'd like doctrine to generate the table in my sql database but here is the answer to:
doctrine:mapping:info -> you do not have any mapped entity
doctrine:schema:update -> you do not have metadata class to process
doctrine:generate:entities RandomnameBundle -> does not contain any mapped entities
Any hint ?

Answer 1

Try changing doctrine orm mapping from auto_mapping to manual.
Example shown below:
doctrine:
...
orm:
...
auto_mapping: true
TO
orm:
entity_managers:
default:
mappings:
NRtworks\ChartOfAccountsBundle: ~

Answer 2

http://docs.doctrine-project.org/en/2.0.x/reference/annotations-reference.html#annref-table
#ORM\Table requires table name.
Required attributes:
name: Name of the table

Answer 3

I did not exactly found the problem but it's solved
-> I have updated Symfony to its last version