php - Symfony Form with subform -

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i have user form , contact form in user form tried add contact form user form

when tried add 

$builder->add(             'contact',             new contacttype()         );

it failed with

you cannot add children simple form. maybe should set option "compound" true?

tried set compound didnt work

/**  * {@inheritdoc}  */ public function configureoptions(optionsresolver $resolver) {     $defaults = array(         'compound' => true,         'inherit_data' => true,     );      $resolver->setdefaults($defaults); }

the compound option default set true.

  1. how did extend form type class? abstractformtype, or else?
  2. did override getparent() method?

this explain compound being set false.


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