Ordering m2m relationship with column from related table (with orderBy option)

class BlogPost extends Doctrine_Record
{
    public function setTableDefinition()
    {
        $this->hasColumn('title', 'string', 128);
        $this->hasColumn('content', 'string');
    }
    
    public function setUp()
    {
        $this->hasMany('BlogCategory as BlogCategories', array('local' => 'id_blog_post', 'foreign' => 'id_blog_category', 'refClass' => 'BlogPostCategory', 'orderBy' => 'name'));        
    }
}

class BlogCategory extends Doctrine_Record
{
    public function setTableDefinition()
    {
        $this->hasColumn('name', 'string', 128);
    }
    
    public function setUp()
    {
        $this->hasMany('BlogPost as BlogPosts', array('local' => 'id_blog_category', 'foreign' => 'id_blog_post', 'refClass' => 'BlogPostCategory'));
    }
}

class BlogPostCategory extends Doctrine_Record
{
    public function setTableDefinition()
    {
        $this->hasColumn('id_blog_post', 'integer', null, array('primary' => true));
        $this->hasColumn('id_blog_category', 'integer', null, array('primary' => true));
    }
    
    public function setUp()
    {
        $this->hasOne('BlogPost', array('local' => 'id_blog_post', 'foreign' => 'id', 'onDelete' => 'CASCADE'));
        $this->hasOne('BlogCategory', array('local' => 'id_blog_category', 'foreign' => 'id', 'onDelete' => 'CASCADE'));
    }
}

$this->option('orderBy', 'name');