Symfony2 ORM prePersist Not Working

prePersist() method of my entity is not being invoked. ``` <?php namespace Acme\DemoBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * Users * * @ORM\Table(name="users") * @ORM\Entity * @ORM\HasLifecycleCallbacks() */ class Users { /** * @var string * * @ORM\Column(name="username", type="string", length=255, nullable=false) */ private $username; /** * @var string * * @ORM\Column(name="firstname", type="string", length=255, nullable=false) */ private $firstname; /** * @var string * * @ORM\Column(name="lastname", type="string", length=255, nullable=false) */ private $lastname; /** * @var string * * @ORM\Column(name="email", type="string", length=255, nullable=false) */ private $email; /** * @var string * * @ORM\Column(name="password", type="string", length=32, nullable=false) */ private $password; /** * @var boolean * * @ORM\Column(name="active", type="boolean", nullable=false) */ private $active; /** * @var \DateTime * * @ORM\Column(name="created", type="datetime", nullable=false) */ private $created; /** * @var \DateTime * * @ORM\Column(name="modified", type="datetime", nullable=false) */ private $modified; /** * @var integer * * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="IDENTITY") */ private $id; /** * Set username * * @param string $username * @return Users */ public function setUsername($username) { $this->username = $username; return $this; } /** * Get username * * @return string */ public function getUsername() { return $this->username; } /** * Set firstname * * @param string $firstname * @return Users */ public function setFirstname($firstname) { $this->firstname = $firstname; return $this; } /** * Get firstname * * @return string */ public function getFirstname() { return $this->firstname; } /** * Set lastname * * @param string $lastname * @return Users */ public function setLastname($lastname) { $this->lastname = $lastname; return $this; } /** * Get lastname * * @return string */ public function getLastname() { return $this->lastname; } /** * Set email * * @param string $email * @return Users */ public function setEmail($email) { $this->email = $email; return $this; } /** * Get email * * @return string */ public function getEmail() { return $this->email; } /** * Set password * * @param string $password * @return Users */ public function setPassword($password) { $this->password = $password; return $this; } /** * Get password * * @return string */ public function getPassword() { return $this->password; } /** * Set active * * @ORM\PrePersist * @param boolean $active * @return Users */ public function setActive($active) { $this->active = $active; return $this; } /** * Get active * * @return boolean */ public function getActive() { return $this->active; } /** * Set created * * @param \DateTime $created * @return Users */ public function setCreated() { $this->created = $created; return $this; } /** * Get created * * @return \DateTime */ public function getCreated() { return $this->created; } /** * Set modified * * @param \DateTime $modified * @return Users */ public function setModified() { $this->modified = $modified; return $this; } /** * Get modified * * @return \DateTime */ public function getModified() { return $this->modified; } /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * @ORM\PrePersist * @ORM\PreUpdate */ public function prePersist(){ $this->active = 0; $this->created = date('Y-m-d H:i:s'); $this->modified = date('Y-m-d H:i:s'); } } ``` Here is my code of Form/UsersType.php ``` <?php namespace Acme\DemoBundle\Form; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolverInterface; class UsersType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('username','text', array('required' => true)) ->add('firstname','text', array('required' => true)) ->add('lastname','text', array('required' => true)) ->add('email', 'email', array('label' => 'E-Mail')) ->add('password', 'password', array('label' => 'Password')) ->add('password_confirmation', 'password', array('mapped' => false)) // Added virtual field on form /* ->add('active','hidden',array('data' => '')) ->add('created','hidden',array('data' => '')) ->add('modified','hidden',array('data' => '')) * */ ; } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( 'data_class' => 'Acme\DemoBundle\Entity\Users' )); } public function getName() { return 'acme_demobundle_userstype'; } } ``` I have commented out these three fields active, created and modified to not display them in the form. But i am getting error: ``` An exception occurred while executing 'INSERT INTO users (username, firstname, lastname, email, password, active, created, modified) VALUES (?, ?, ?, ?, ?, ?, ?, ?)' with params ["neeraj", "neeraj", "kumar", "neeraj.kumar@test.com", "p@ssw0rd", null, null, null]: ``` What i am missing in the Entity? Stack Trace ``` Stack Trace (Plain Text) - [1] Doctrine\DBAL\DBALException: An exception occurred while executing 'INSERT INTO users (username, firstname, lastname, email, password, active, created, modified) VALUES (?, ?, ?, ?, ?, ?, ?, ?)' with params ["neeraj", "neeraj", "kumar", "neeraj.kumar@rsystems.com", "p@ssw0rd", null, null, null]: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'active' cannot be null at n/a in C:\wamp\www\Symfony\vendor\doctrine\dbal\lib\Doctrine\DBAL\DBALException.php line 47 at Doctrine\DBAL\DBALException::driverExceptionDuringQuery(object(PDOException), 'INSERT INTO users (username, firstname, lastname, email, password, active, created, modified) VALUES (?, ?, ?, ?, ?, ?, ?, ?)', array('neeraj', 'neeraj', 'kumar', 'neeraj.kumar@rsystems.com', 'p@ssw0rd', null, null, null)) in C:\wamp\www\Symfony\vendor\doctrine\dbal\lib\Doctrine\DBAL\Statement.php line 140 at Doctrine\DBAL\Statement->execute() in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\Persisters\BasicEntityPersister.php line 277 at Doctrine\ORM\Persisters\BasicEntityPersister->executeInserts() in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\UnitOfWork.php line 929 at Doctrine\ORM\UnitOfWork->executeInserts(object(ClassMetadata)) in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\UnitOfWork.php line 318 at Doctrine\ORM\UnitOfWork->commit(null) in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\EntityManager.php line 355 at Doctrine\ORM\EntityManager->flush() in C:\wamp\www\Symfony\src\Acme\DemoBundle\Controller\UsersController.php line 55 at Acme\DemoBundle\Controller\UsersController->createAction(object(Request)) in line at call_user_func_array(array(object(UsersController), 'createAction'), array(object(Request))) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2774 at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), '1') in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2748 at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), '1', true) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2878 at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(object(Request), '1', true) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2179 at Symfony\Component\HttpKernel\Kernel->handle(object(Request)) in C:\wamp\www\Symfony\web\app_dev.php line 28 [2] PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'active' cannot be null at n/a in C:\wamp\www\Symfony\vendor\doctrine\dbal\lib\Doctrine\DBAL\Statement.php line 138 at PDOStatement->execute(null) in C:\wamp\www\Symfony\vendor\doctrine\dbal\lib\Doctrine\DBAL\Statement.php line 138 at Doctrine\DBAL\Statement->execute() in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\Persisters\BasicEntityPersister.php line 277 at Doctrine\ORM\Persisters\BasicEntityPersister->executeInserts() in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\UnitOfWork.php line 929 at Doctrine\ORM\UnitOfWork->executeInserts(object(ClassMetadata)) in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\UnitOfWork.php line 318 at Doctrine\ORM\UnitOfWork->commit(null) in C:\wamp\www\Symfony\vendor\doctrine\orm\lib\Doctrine\ORM\EntityManager.php line 355 at Doctrine\ORM\EntityManager->flush() in C:\wamp\www\Symfony\src\Acme\DemoBundle\Controller\UsersController.php line 55 at Acme\DemoBundle\Controller\UsersController->createAction(object(Request)) in line at call_user_func_array(array(object(UsersController), 'createAction'), array(object(Request))) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2774 at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), '1') in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2748 at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), '1', true) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2878 at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(object(Request), '1', true) in C:\wamp\www\Symfony\app\bootstrap.php.cache line 2179 at Symfony\Component\HttpKernel\Kernel->handle(object(Request)) in C:\wamp\www\Symfony\web\app_dev.php line 28 ```