Zend framework 2 translator in model

Question

How to get translator in model?

Inside view we can get translator using this code

$this->translate('Text')

Inside controller we can get translator using this code

$translator=$this->getServiceLocator()->get('translator');

$translator->translate("Text") ;

But how to get translator in model?

I'd tried so many ways to get service locator in models 2 of those

1)Using MVC events

    $e=new MvcEvent();
    $sm=$e->getApplication()->getServiceManager();
    $this->translator = $sm->get('translator');

if i pring $sm it is showing null. but it works fine in Model.php onBootstrap

2)Created one model which implements ServiceLocatorAwareInterface SomeModel.php

    <?php

namespace Web\Model;

use Zend\ServiceManager\ServiceLocatorAwareInterface;
use Zend\ServiceManager\ServiceLocatorInterface;

class SomeModel implements ServiceLocatorAwareInterface
{
    protected $services;

    public function setServiceLocator(ServiceLocatorInterface $locator)
    {
        $this->services = $locator;
    }

    public function getServiceLocator()
    {
        return $this->services;
    }
}

and used that inside my model

        $sl = new SomeModel();
        $sm=$sl->getServiceManager();
        var_dump($sm); exit;
        $this->translator = $sm->get('translator');

this is also printing null.

Answer 1

If you don't need the servicemanager instance in your model, simply inject translator instance to it.

For example:

// Your model's constructor

class MyModel {
  // Use the trait if your php version >= 5.4.0
  use \Zend\I18n\Translator\TranslatorAwareTrait;

  public function __construct( $translator )
  {
     $this->setTranslator( $translator ); 
  }

  public function modelMethodWhichNeedsToUseTranslator()
  {
    // ...
    $text = $this->getTranslator()->translate('lorem ipsum');
    // ...
  }
}

When you creating your model first time on service or controller level

class someClass implements ServiceLocatorAwareInterface {
    public function theMethodWhichCreatesYourModelInstance()
    {
    // ...
    $sm = $this->getServiceLocator();
    $model = new \Namespace\MyModel( $sm->get('translator') )
    // ...
    }
}

If you need to instantiate your model (new MyModel();) on multiple methods/classes, consider to writing a factory for it.

Here is a nice article about Dependency Injection and PHP by Ralph Schindler for more detailed comments about this approach.