Zend Framework 2 : Dynamic Navigation using Zend\Navigation

Zend Framework 2 provide Navigation component to generate menu. It can utilize by creating static config in autoload/*.global.php. Sometime, we need dynamic menu to be generated in our application. I will give you a simple example to do that.

For example, i want structure menu like this :

So, we should do step by step like the following :
1. Create a menu Table (I’m using postgresql, you can specify yourself for your database )

CREATE TABLE menu
(
  id bigserial NOT NULL,
  name character varying(255),
  label character varying(255),
  route character varying(255),
  CONSTRAINT pk_menu PRIMARY KEY (id )
)
WITH (
  OIDS=FALSE
);
ALTER TABLE menu
  OWNER TO postgres;

2. Insert the data like the following :

3. create a Model :

namespace ZendSkeletonModule\Model;

use Zend\Db\Adapter\Adapter;
use Zend\Db\ResultSet\HydratingResultSet;
use Zend\Db\TableGateway\AbstractTableGateway;
use Zend\Db\Sql\Select;
use Zend\Db\Adapter\AdapterAwareInterface;

class MenuTable extends AbstractTableGateway
    implements AdapterAwareInterface
{
    protected $table = 'menu';

    public function setDbAdapter(Adapter $adapter)
    {
        $this->adapter = $adapter;
        $this->resultSetPrototype = new HydratingResultSet();

        $this->initialize();
    }

    public function fetchAll()
    {
        $resultSet = $this->select(function (Select $select){
                $select->order(array('id asc'));
        });

        $resultSet = $resultSet->toArray();

        return $resultSet;
    }
}

4. Extends Zend\Navigation\Service\DefaultNavigationFactory and override getPages() function.

namespace ZendSkeletonModule\Navigation;

use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\Navigation\Service\DefaultNavigationFactory;

class MyNavigation extends DefaultNavigationFactory
{
    protected function getPages(ServiceLocatorInterface $serviceLocator)
    {
        if (null === $this->pages) {
            //FETCH data from table menu :
            $fetchMenu = $serviceLocator->get('menu')->fetchAll();

            $configuration['navigation'][$this->getName()] = array();
            foreach($fetchMenu as $key=>$row)
            {
                $configuration['navigation'][$this->getName()][$row['name']] = array(
                    'label' => $row['label'],
                    'route' => $row['route'],
                );
            }
            
            if (!isset($configuration['navigation'])) {
                throw new Exception\InvalidArgumentException('Could not find navigation configuration key');
            }
            if (!isset($configuration['navigation'][$this->getName()])) {
                throw new Exception\InvalidArgumentException(sprintf(
                    'Failed to find a navigation container by the name "%s"',
                    $this->getName()
                ));
            }

            $application = $serviceLocator->get('Application');
            $routeMatch  = $application->getMvcEvent()->getRouteMatch();
            $router      = $application->getMvcEvent()->getRouter();
            $pages       = $this->getPagesFromConfig($configuration['navigation'][$this->getName()]);

            $this->pages = $this->injectComponents($pages, $routeMatch, $router);
        }
        return $this->pages;
    }
}

5. Create Your Navigation Factory

namespace ZendSkeletonModule\Navigation;

use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;

class MyNavigationFactory implements FactoryInterface
{
    public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $navigation =  new MyNavigation();
        return $navigation->createService($serviceLocator);
    }
}

6. Register MenuTable model, and your Navigation in ServiceManager :

class Module
{
    public function getServiceConfig()
    {
        return array(
            'initializers' => array(
                function ($instance, $sm) {
                    if ($instance instanceof \Zend\Db\Adapter\AdapterAwareInterface) {
                        $instance->setDbAdapter($sm->get('Zend\Db\Adapter\Adapter'));
                    }
                }
            ),
            'invokables' => array(
                 'menu' => 'ZendSkeletonModule\Model\MenuTable' 
            ),
            'factories' => array(
                'Navigation' => 'ZendSkeletonModule\Navigation\MyNavigationFactory'
            )
          );
    }

    public function getConfig()
    {
        return include __DIR__ . '/config/module.config.php';
    }
 
    public function getAutoloaderConfig()
    {
        return array(
            'Zend\Loader\StandardAutoloader' => array(
                'namespaces' => array(
                     __NAMESPACE__ => __DIR__ . '/src/' . __NAMESPACE__,
                ),
            ),
        );
    }
}

6. Configuration done, let’s call from layout:

<div class="nav-collapse">
<?php echo $this->navigation('Navigation')->menu()->setUlClass('nav'); ?>
</div>

Done !

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