在 Symfony 2.8、3.0及以上版本中将数据传递给 buildForm()

This broke some of our forms as well. I fixed it by passing the custom data through the options resolver.

In your form type:

public function buildForm(FormBuilderInterface $builder, array $options)
{
$this->traitChoices = $options['trait_choices'];


$builder
...
->add('figure_type', ChoiceType::class, [
'choices' => $this->traitChoices,
])
...
;
}


public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'trait_choices' => null,
]);
}

Then when you create the form in your controller, pass it in as an option instead of in the constructor:

$form = $this->createForm(ProfileEditType::class, $profile, [
'trait_choices' => $traitChoices,
]);

In case anyone is using a 'createNamedBuilder' or 'createNamed' functions from form.factory service here's the snippet on how to set and save the data using it. You cannot use the 'data' field (leave that null) and you have to set the passed data/entities as $options value.

I also incorporated @sarahg instructions about using setAllowedTypes() and setRequired() options and it seems to work fine but you first need to define field with setDefined()

Also inside the form if you need the data to be set remember to add it to 'data' field.

In Controller I am using getBlockPrefix as getName was deprecated in 2.8/3.0

Controller:

/*
* @var $builder Symfony\Component\Form\FormBuilderInterface
*/
$formTicket = $this->get('form.factory')->createNamed($tasksPerformedForm->getBlockPrefix(), TaskAddToTicket::class, null, array('ticket'=>$ticket) );

Form:

public function configureOptions(OptionsResolver $resolver)    {
$resolver->setDefined('ticket');
$resolver->setRequired('ticket');
$resolver->addAllowedTypes('ticket', Ticket::class);


$resolver->setDefaults(array(
'translation_domain'=>'AcmeForm',
'validation_groups'=>array('validation_group_001'),
'tasks' => null,
'ticket' => null,
));
}


public function buildForm(FormBuilderInterface $builder, array $options)   {


$this->setTicket($options['ticket']);
//This is required to set data inside the form!
$options['data']['ticket']=$options['ticket'];


$builder


->add('ticket',  HiddenType::class, array(
'data_class'=>'acme\TicketBundle\Entity\Ticket',
)
)
...
}

Here's how to pass the data to an embedded form for anyone using Symfony 3. First do exactly what @sekl outlined above and then do the following:

In your primary FormType

Pass the var to the embedded form using 'entry_options'

->add('your_embedded_field', CollectionType::class, array(
'entry_type' => YourEntityType::class,
'entry_options' => array(
'var' => $this->var
)))

In your Embedded FormType

Add the option to the optionsResolver

public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Yourbundle\Entity\YourEntity',
'var' => null
));
}

Access the variable in your buildForm function. Remember to set this variable before the builder function. In my case I needed to filter options based on a specific ID.

public function buildForm(FormBuilderInterface $builder, array $options)
{
$this->var = $options['var'];


$builder
->add('your_field', EntityType::class, array(
'class' => 'YourBundle:YourClass',
'query_builder' => function ($er) {
return $er->createQueryBuilder('u')
->join('u.entity', 'up')
->where('up.id = :var')
->setParameter("var", $this->var);
}))
;
}

Here can be used another approach - inject service for retrieve data.

1. Describe your form as service (cookbook)
2. Add protected field and constructor to form class
3. Use injected object for get any data you need

Example:

services:
app.any.manager:
class: AppBundle\Service\AnyManager


form.my.type:
class: AppBundle\Form\MyType
arguments: ["@app.any.manager"]
tags: [ name: form.type ]

<?php


namespace AppBundle\Form;


use AppBundle\Service\AnyManager;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;


class MyType extends AbstractType {


/**
* @var AnyManager
*/
protected $manager;


/**
* MyType constructor.
* @param AnyManager $manager
*/
public function __construct(AnyManager $manager) {
$this->manager = $manager;
}


public function buildForm(FormBuilderInterface $builder, array $options) {
$choices = $this->manager->getSomeData();


$builder
->add('type', ChoiceType::class, [
'choices' => $choices
])
;
}


public function configureOptions(OptionsResolver $resolver) {
$resolver->setDefaults([
'data_class' => 'AppBundle\Entity\MyData'
]);
}


}