From my Factory i am passsing serviceLocator to the controller, but it seems like ObservationFactory is not being called even i have included in the module.config.php file of the Module

Here is my ObservationController.php

```
    class ObservationController extends AbstractActionController
{
    private $em;
    public function __construct($ob)
    {
        $this->em = $ob->get('doctrine.entitymanager.orm_default');
    }

```

here is ObservationFactory.php

```
    class ObservationFactory implements FactoryInterface
{
    public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $controller = new ObservationController($serviceLocator->getServicelocator());
        return $controller;
    }
}

```

and in Module.config.php

```
'controllers' => array(
    'factories' => array(
        'Observation\Controller\ObservationController' => 'Observation\Controller\ObservationFactory'
    ),
    'invokables' => array(
            'Observation\Controller\Observation'=> Controller\ObservationController::class
    ),
),

```

> 
> Missing argument 1 for Observation\Controller\ObservationController::\_\_construct(), called in S:\xampp\htdocs\v3\vendor\zendframework\zend-servicemanager\src\AbstractPluginManager.php on line 207 and defined in S:\xampp\htdocs\v3\module\Observation\src\Observation\Controller\ObservationController.php on line 47
> 
> 
> Notice: Undefined variable: ob in
>  S:\xampp\htdocs\v3\module\Observation\src\Observation\Controller\ObservationController.php
>  on line 49
> 
> 
> Fatal error: Uncaught Error: Call to a member function get() on
>  unknown in
> 
> 
>