Can not retrieve the object manager in the input_filter config

Question

I want to reuse a Fieldset that implements InputFilterProviderInterface o it has the method getInputFilterSpecification where I can declare the specifications for all the elements in the fieldset.

public function getInputFilterSpecification()
    {
        return array(
            'email' => array(
                'filters' => $this->getTextFilters(),
                'validators' => array(
                    $this->getUniqueObjectValidator()
...

The problem is that the getUniqueObjectValidator needs the Doctrine\ORM\EntityManager but it is not declared in the ServiceLocator for the InputFilter.

How do you think I can acces to the EntityManager in the inputFilter factories?

Answer 1

To do that, you need to inject the DoctrineORM EntityManager in your fieldset. You could for example transfer ther $em from controller to form, and then from form to fieldset but this is a bad and ugly solution especialy when you have a complexe form with many fieldsets. A good solution is to take advantage from the Zend\ServiceManager\ServiceLocator.

Here is a proper way handle this :

First, you have to implement the getFormElementConfig() function in your Module class. Something like this :

// module.php
public function getFormElementConfig()
{
return array(
    'factories' => array(
        'yourfieldset' => function ($sm) {
            $em = $sm->getServiceLocator()->get('Doctrine\ORM\EntityManager');
            $fieldset = new YourFieldset($em);
            return $fieldset;
        }
    )
);
}

Then make sure your fieldest calls the parent constructor like this :

parent::__construct('yourfieldset'); //with the name of the factory

And finaly instantiate the form via the FormElementManager. :

$formManager = $this->serviceLocator->get('FormElementManager');
$form = $formManager->get('ModuleName\Form\YourForm');

Please see these links for more details :

• Handling dependencies in ZF2 forms
• Inject DoctrineORM EntityManager in ZF2 Form
• SO : Handling dependencies in Zend Framework 2 Forms
• Howto Handle External Form Element Dependencies with FormElementManager