Saving / embedding associated form types - symfony

Question

I have 2 Entities User and Member
The User has all of the normal stuff associated (username, password, email)
The Member has some other fields, including, First Name, Last Name, Age etc
I'm trying to create a new Member and to display a form with both the User fields and the Member fields.
I currently have the following:
User.php
$protected $username;
$protected $email;
/**
* #ORM\OneToMany(targetEntity="BM\UserBundle\Entity\Member", mappedBy="user")
*/
protected $member;
Member.php
/**
* #ORM\ManyToOne(targetEntity="BM\UserBundle\Entity\User", inversedBy="member")
*/
protected $user;
I have 2 form types as well:
MemberType.php
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('user', new UserType())
->add('firstname')
->add('lastname')
->add('age')
;
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'BM\UserBundle\Entity\User'
);
}
UserType.php
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('username')
->add('email')
->add('password')
;
}
public function getName()
{
return 'user';
}
When I refresh the page where the form is rendered, I get the following error:
Catchable Fatal Error: Argument 1 passed to BM\UserBundle\Entity\Member::setUser() must be an instance of BM\UserBundle\Entity\User, array given, called in /var/www/proj/vendor/symfony/symfony/src/Symfony/Component/PropertyAccess/PropertyAccessor.php on line 345 and defined in /var/www/proj/src/BM/UserBundle/Entity/Member.php line 259
Line 259 is:
public function setUser(\BM\UserBundle\Entity\User $user = null)
Am I approaching this the right way?
EDIT:
MemberController.php
$member = new Member();
$form = $this->createForm(new MemberType(), $member);
if($request->isMethod('post')) {
$form->submit($request);
if ($form->isValid()) {
$em->persist($member);
$em->flush();
$request->getSession()->getFlashBag()->add('success', 'Member has been saved');
} else {
$request->getSession()->getFlashBag()->add('error', 'Could not save the member');
}
}

Answer 1

Try in this way
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('user', new UserType())
->add('firstname')
->add('lastname')
->add('age')
;
}
public function setDefaultOptions(array $options)
{
return array(
'data_class' => 'BM\UserBundle\Entity\Member'
);
}
# UserType.php #
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('username')
->add('email')
->add('password')
;
}
public function setDefaultOptions(array $options)
{
return array(
'data_class' => 'BM\UserBundle\Entity\User'
);
}
Take a look the documentation: http://symfony.com/doc/current/cookbook/form/form_collections.html