symfony2 service array parameters. How to get value based on key - php

Question

I'm creating new invoice form, which includes select input with some constant values.
I've made it through services:
services.yml
parameters:
stawki_vat:
0: 0%
5: 5%
8: 8%
23: 23%
zw: zw.
services:
acme.form.type.stawki_vat:
class: Acme\FakturyBundle\Form\Type\StawkiVatType
arguments:
- "%stawki_vat%"
tags:
- { name: form.type, alias: stawki_vat }
StawkiVatType.php
class StawkiVatType extends AbstractType
{
private $stawkiVatChoices;
public function __construct(array $stawkiVatChoices) {
$this->stawkiVatChoices = $stawkiVatChoices;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'choices' => $this->stawkiVatChoices,
));
}
public function getParent()
{
return 'choice';
}
public function getName()
{
return 'stawki_vat';
}
}
TowarType.php
class TowarType extends AbstractType
{
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('nazwa_towar', null, array('label' => 'Nazwa towaru/usługi'))
->add('cena_netto', null, array(
'label' => 'Cena netto'
))
->add('vat', 'stawki_vat', array(
'attr' => array('class' => 'styled'),
'label' => 'Stawka VAT',
))
;
}
In form, everything works perfect.
But now, I want to get a value stored in database (key of stawki_vat) and show a value of stawki_vat array.
How to achieve this in simple way?

Answer 1

You need to pass your entity manager to your custom form type service. Presuming you are using Doctrine:
services.yml
services:
acme.form.type.stawki_vat:
class: Acme\FakturyBundle\Form\Type\StawkiVatType
arguments: ["#doctrine.orm.entity_manager","%stawki_vat%"]
StawkiVatType.php
class StawkiVatType extends AbstractType
{
private $stawkiVatChoices;
private $em;
public function __construct(EntityManager $em, array $stawkiVatChoices) {
$this->em = $em;
$this->stawkiVatChoices = $stawkiVatChoices;
}
// ...