[Form] EventSubscriber as service

[NOP-erator]

I'm trying to use dynamic form generation as described here
http://symfony.com/doc/current/cookbook/form/dynamic_form_generation.html

In my EventSubscriber I'm adding Entity-type fields with a custom query builder. No matter if I use the custom query builder or a function in the repository class of the entity, I cannot access other services. I need the security.context to add information about the currently logged in user to my query. What is the best way to achieve this?
It seems wrong to pass a service to the form contructor that passes the service to the event subscriber constructor which uses the service to return a query builder, doesn't it?

[blogsh]

I'd define the new form type as a service and also the subscriber. Then I'd pass the security context to the subscriber and the subscriber to the form type.

Code: Select all

class AddNameFieldSubscriber implements EventSubscriberInterface
{
    private $securityContext;
    private $factory;

    public function __construct(FormFactoryInterface $factory, SecurityContextInterface $securityContext)
    {
         $this->... = ...;
    }

    ...
}

Code: Select all

class ProductType extends AbstractType
{
    private $subscriber;

    public function __construct(AddNameFieldSubscriber $subscriber)
    {
         $this->subscriber = $subscriber;
    }

    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->addEventSubscriber($this->subscriber);
        ....
    }

   ....
}

Code: Select all

services:
    my_subscriber:
        class: MyBundle\AddNameFieldSubscriber
        arguments: [@form.factory, @security.context]

    my_type:
         class: MyBundle\ProductType
         arguments: [@my_subscriber]
         tags:
             - { name: form.type, alias: my_type }
         

You can read about defining form types as services here: http://symfony.com/doc/current/cookbook ... _type.html

[NOP-erator]

Thank you very much for that answer. I will try that and report.