entitytype multiple default value - symfony

Question

i have a entitytype and i want give default value (i have the id of entity type)
->add('esame_' . $i, EntityType::class, array(
'label' => false,
'mapped' => false,
'class' => 'AppBundle:Nome_esame',
'required' => true,
'multiple' => true,
'data'=>array($id_Nome_esame1,$id_Nome_esame2) ,
'choice_label' => 'nome',
// 'disabled' => 'disabled',
'attr' => array(
'placeholder' => 'Esami',
'class' => 'max_width esame_row select_esame',
// 'class'=>'col-md-12 col-md-offset-0 col-xs-9 col-xs-offset-3 ',
)
))
My goal is give 2 or more default value to that entity
i try
'data'=>array($id_Nome_esame1,$id_Nome_esame2)
where $id_Nome_esame1, and $id_Nome_esame2 are the id value of entity type by it don't work

Answer 1

I think your data has to be the same type as the class (AppBundle:Nome_esame)
Try something like this (you will need to bring doctrine or the entity manager into your FormType if you didn't do that yet)
->add('esame_' . $i, EntityType::class, array(
'label' => false,
'mapped' => false,
'class' => 'AppBundle:Nome_esame',
'required' => true,
'multiple' => true,
'data' => array($this->em->getReference("AppBundle:Nome_esame", $id_Nome_esame1), $this->em->getReference("AppBundle:Nome_esame", $id_Nome_esame2)),
'choice_label' => 'nome',
// 'disabled' => 'disabled',
'attr' => array(
'placeholder' => 'Esami',
'class' => 'max_width esame_row select_esame',
// 'class'=>'col-md-12 col-md-offset-0 col-xs-9 col-xs-offset-3 ',
)
))
To get the entity manager, if you use the formType as a service, inject doctrine into it, if not, just past it via __construct.
Hope this helps,
Alexandru Cosoi