Optional embed form in Symfony 2

Question

I have two entities in my system: Person and Phone as the following code.

class Person
{
    /**
     * @ORM\\Id
     * @ORM\\Colum         


        

Answer 1

frankie567's answer was useful to me. For symfony >= 3.0:

/**
 *
 * @Assert\Callback()
 */
public function validatePhone(ExecutionContextInterface $context)
{
    if (/* Fields are not empty */)
    {
        $validator = $context->getValidator();

        $validator->inContext($context)
            ->atPath('phone')
            // you can pass custom validation instead of null, like new Assert\Valid()
            ->validate($this->getPhone(), null, array('phone_validation'));   
    }
}