Joomla Router JComponentRouterView does not work

I try to use the new router system in a component, i have read docs.joomla.org/Supporting_SEF_URLs_in_your_component and looked at examples, i try to use in my component but something does not work: My router is:

<?php

// No direct access
defined('_JEXEC') or die;

JLoader::registerPrefix('Courses', JPATH_SITE . '/components/com_courses/');


class CoursesRouter extends JComponentRouterView
{
public function __construct($app = null, $menu = null) {

$schoolscategory = new JComponentRouterViewconfiguration('schoolscategory');
$schoolscategory->setKey('id');
$this->registerView($schoolscategory);

$course = new JComponentRouterViewconfiguration('course');
$course->setKey('id')->setParent($schoolscategory, 'category');
$this->registerView($course);

parent::__construct($app, $menu);

$this->attachRule(new JComponentRouterRulesMenu($this));
$this->attachRule(new JComponentRouterRulesStandard($this));
$this->attachRule(new JComponentRouterRulesNomenu($this));
}


public function getSchoolscategorySegment($id, $query) {
if (!strpos($id, ':')) {
$db = JFactory::getDbo();
$dbquery = $db->getQuery(true);
$dbquery->select($dbquery->qn('alias'))->from($dbquery->qn('#__courses_schools_categories'))->where('id = ' . $dbquery->q($id));
$db->setQuery($dbquery);

$id .= ':' . $db->loadResult();
}
list($id, $segment) = explode(':', $id, 2);
return array($id => $segment);
}

public function getCourseSegment($id, $query) {
if (!strpos($id, ':')) {
$db = JFactory::getDbo();
$dbquery = $db->getQuery(true);
$dbquery->select($dbquery->qn('alias'))->from($dbquery->qn('#__courses_courses'))->where('id = ' . $dbquery->q($id));
$db->setQuery($dbquery);
$id .= ':' . $db->loadResult();
}
list($void, $segment) = explode(':', $id, 2);
return array($void => $segment);
}

public function getSchoolscategoryId($segment, $query) {
if (isset($query)) {
$db = JFactory::getDbo();
$dbquery = $db->getQuery(true);
$dbquery->select($dbquery->qn('id'))
->from($dbquery->qn('#__courses_schools_categories'))
->where('alias = ' . $dbquery->q($segment))
->where('category = ' . $dbquery->q($query));
$db->setQuery($dbquery);
return (int) $db->loadResult();
}
}

public function getCourseId($segment, $query) {
$db = JFactory::getDbo();
$dbquery = $db->getQuery(true);
$dbquery->select($dbquery->qn('id'))
->from($dbquery->qn('#__courses_courses'))
->where('alias = ' . $dbquery->q($segment))
->where('category = ' . $dbquery->q($query));
$db->setQuery($dbquery);
return (int) $db->loadResult();
}

}

but if i try to use jrouter: JRoute::_('index.php?option=com_courses&view=course&category=5:area-fiscalita&id=3:corso-oro-fiscalita-passato')

with slug for category "5:area-fiscalita" and slug for course "3:corso-oro-fiscalita-passato" get the url: corsi?view=course&category=5:area-fiscalita&id=3:corso-oro-fiscalita-passato

"corsi" is the item name in menu

instead of: corsi/nameOfCategory/nameOfcourse

like corsi/area-fiscalita/corso-oro-fiscalita-passato

why don't work?

thanks

Hi this is the code:
codeshare.io/2EEmMO

but in com_content example online is not buildRoute or parseRoute functions, and is not in the documentation.
In your route.php (in the component generated with component creator) you use the old system with functions build and parse.
In the documentation:
docs.joomla.org/Supporting_SEF_URLs_in_your_component
the new system it's different.

thanks for your help

no error! just don't make the parse, the url:
JRoute::_('index.php?option=com_courses&view=course&category=5:area-fiscalita&id=3:corso-oro-fiscalita-passato')
must transform in:
menuitem/area-fiscalita/corso-oro-fiscalita-passato
but give me:
menuitem?view=course&category=5:area-fiscalita&id=3:corso-oro-fiscalita-passato

i try with
JRoute::_('index.php?option=com_courses&view=course&category=5&id=3:corso-oro-fiscalita-passato')
without slug in category, but give me the same:
menuitem?view=course&category=5&id=3:corso-oro-fiscalita-passato

but the code is equal to com_content...

i check and the functions getCourseSegment and getSchoolscategorySegment are called.