Can't get objects from repository from Command - symfony

Question

I want to update some rows from table comments.
class TryCommentsCommand extends ContainerAwareCommand
{
protected function configure()
{
//blah-blah-blah
}
private function update_comments($step_size, OutputInterface $output)
{
$doctrine = $this->getContainer()->get('doctrine');
$not_moderated_comments = $doctrine->getRepository('***Bundle:Comments')
->findBy(array('is_automoderated' => false))
->orderBy('c.date', 'DESC')
->setMaxResults($step_size)
->setFirstResult(0)
->getQuery()->getResult();
for ($not_moderated_comments as $comment)
{
$comment.setIsAutomoderated(true);
$comment.save();
}
}
protected function execute(InputInterface $input, OutputInterface $output)
{
self::update_comments(intval($input->getArgument('step')), $output);
}
}
I'd write this command and try to run this, but got the error
Fatal error: Class 'Blogger\BlogBundle\Repository\BlogRepository' not found in C:\Users\.. ..\vendor\doctrine\orm\lib\Doctrine\ORM\Repository\DefaultRepositoryFactory.php on line 75
How to fix it? How get entities from table?
UPD: My ***Bundle:Comments
namespace pv\***Bundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Comments
*/
class Comments
{
/**
* #var integer
*/
private $id;
/**
* #var \DateTime
*/
private $date;
/**
* #var string
*/
private $name;
/**
* #var string
*/
private $comment;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set date
*
* #param \DateTime $date
* #return Comments
*/
public function setDate($date)
{
$this->date = $date;
return $this;
}
/**
* Get date
*
* #return \DateTime
*/
public function getDate()
{
return $this->date;
}
/**
* Set name
*
* #param string $name
* #return Comments
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set name
*
* #param string $name
* #return Comments
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Set comment
*
* #param string $comment
* #return Comments
*/
public function setComment($comment)
{
$this->comment = $comment;
return $this;
}
/**
* Get comment
*
* #return string
*/
public function getComment()
{
return $this->comment;
}
}