Passing data to buildForm() in Symfony 2.8, 3.0 and above

Question

My application currently passes data to my form type using the constructor, as recommended in this answer. However the Symfony 2.8 upgrade guide advises that passing a type

Answer 1

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);
           }))
     ;
}