How to map an object in a form in Symfony 2

Question

I have a problem using Symfony 2. When I try to fill out a form with data from Entity, I get this error:

"It is expected that form view data will be of type scalar, array, or \ ArrayAccess instance, but it is an instance of the DateTime class. You can avoid this error by setting the" data_class "option to" DateTime "or by adding a view transformer that converts an instance of the DateTime class to scalar, array, or instance of \ ArrayAccess. "

I have little experience with Symfony 2. I use the YAML parameter to create objects.

Thanks.

Controller Code:

public function editAction($id) { $em = $this->getDoctrine()->getManager(); $candidate = $em->getRepository('OUProjectBundle:Candidate')->findOneById($id); $form = $this->createForm(new CandidateType(), $candidate); return $this->render('MyProjectBundle:Candidate:new.html.twig', array( 'form' => $form->createView(), )); } 

CandidateType Class:

 namespace My\ProjectBundle\Form; use Symfony\Component\Form\AbstractType; use My\ProjectBundle\Entity\Candidate; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolverInterface; use Doctrine\ORM\EntityRepository; class CandidateType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder->add('name', 'text', array('label'=>'Name:')); $builder->add('surname', 'text', array('label'=>'Surname:')); $builder->add('email', 'text', array('label'=>'Email:')); $builder->add('phone', 'text', array('label'=>'Telephone:')); $builder->add('DOB', 'text', array('label'=>'Date of Birth:')); $builder->add('address', 'text', array('label'=>'Address')); $builder->add('town', 'text', array('label'=>'Town:')); $builder->add('city', 'text', array('label'=>'City:')); $builder->add('post_code', 'text', array('label'=>'Post Code:')); $builder->add('file', 'file', array('label' => 'CV file (.docx)', 'required' => true)); } public function getName() { return 'candidate'; } public function getDefaultOptions(array $options) { return array( 'data_class' => 'My\ProjectBundle\Entity\Candidate', ); } } 

Essence:

 namespace OU\ProjectBundle\Entity; use Doctrine\ORM\Mapping as ORM; use My\ProjectBundle\Utils\DocReader; /** * Candidate */ class Candidate { /** * @var integer */ private $id; /** * @var string */ private $name; /** * @var string */ private $surname; /** * @var \DateTime */ private $dob; /** * @var string */ private $phone; /** * @var string */ private $address; /** * @var string */ private $town; /** * @var string */ private $city; /** * @var string */ private $post_code; /** * @var string */ private $cv_text; /** * @var string */ private $cv_file; /** * @var \DateTime */ private $createdAt; /** * @var \DateTime */ private $updatedAt; /** * @var \DateTime */ private $deletedAt; /** * @var \Doctrine\Common\Collections\Collection */ private $skill; public $file; /** * Constructor */ public function __construct() { $this->skill = new \Doctrine\Common\Collections\ArrayCollection(); } /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set name * * @param string $name * @return Candidate */ public function setName($name) { $this->name = $name; return $this; } /** * Get name * * @return string */ public function getName() { return $this->name; } /** * Set surname * * @param string $surname * @return Candidate */ public function setSurname($surname) { $this->surname = $surname; return $this; } /** * Get surname * * @return string */ public function getSurname() { return $this->surname; } /** * Set dob * * @param \DateTime $dob * @return Candidate */ public function setDob($dob) { $this->dob = new \DateTime($dob); return $this; } /** * Get dob * * @return \DateTime */ public function getDob() { return $this->dob; } /** * Set phone * * @param string $phone * @return Candidate */ public function setPhone($phone) { $this->phone = $phone; return $this; } /** * Get phone * * @return string */ public function getPhone() { return $this->phone; } /** * Set address * * @param string $address * @return Candidate */ public function setAddress($address) { $this->address = $address; return $this; } /** * Get address * * @return string */ public function getAddress() { return $this->address; } /** * Set town * * @param string $town * @return Candidate */ public function setTown($town) { $this->town = $town; return $this; } /** * Get town * * @return string */ public function getTown() { return $this->town; } /** * Set city * * @param string $city * @return Candidate */ public function setCity($city) { $this->city = $city; return $this; } /** * Get city * * @return string */ public function getCity() { return $this->city; } /** * Set post_code * * @param string $postCode * @return Candidate */ public function setPostCode($postCode) { $this->post_code = $postCode; return $this; } /** * Get post_code * * @return string */ public function getPostCode() { return $this->post_code; } /** * Set cv_text * * @param string $cvText * @return Candidate */ public function setCvText($cvText) { $this->cv_text = $cvText; return $this; } /** * Get cv_text * * @return string */ public function getCvText() { return $this->cv_text; } /** * Set cv_file * * @param string $cvFile * @return Candidate */ public function setCvFile($cvFile) { $this->cv_file = $cvFile; return $this; } /** * Get cv_file * * @return string */ public function getCvFile() { return $this->cv_file; } /** * Set createdAt * * @param \DateTime $createdAt * @return Candidate */ public function setCreatedAt($createdAt) { $this->createdAt = $createdAt; return $this; } /** * Get createdAt * * @return \DateTime */ public function getCreatedAt() { return $this->createdAt; } /** * Set updatedAt * * @param \DateTime $updatedAt * @return Candidate */ public function setUpdatedAt($updatedAt) { $this->updatedAt = $updatedAt; return $this; } /** * Get updatedAt * * @return \DateTime */ public function getUpdatedAt() { return $this->updatedAt; } /** * Set deletedAt * * @param \DateTime $deletedAt * @return Candidate */ public function setDeletedAt($deletedAt) { $this->deletedAt = $deletedAt; return $this; } /** * Get deletedAt * * @return \DateTime */ public function getDeletedAt() { return $this->deletedAt; } /** * Add skill * * @param \My\ProjectBundle\Entity\Skill $skill * @return Candidate */ public function addSkill(\My\ProjectBundle\Entity\Skill $skill) { $this->skill[] = $skill; return $this; } /** * Remove skill * * @param \My\ProjectBundle\Entity\Skill $skill */ public function removeSkill(\My\ProjectBundle\Entity\Skill $skill) { $this->skill->removeElement($skill); } /** * Get skill * * @return \Doctrine\Common\Collections\Collection */ public function getSkill() { return $this->skill; } /** * @ORM\PrePersist */ public function preUpload() { if (null !== $this->file) { // do whatever you want to generate a unique name $extension = $this->file->guessExtension(); if($extension === "zip") $extension = "docx"; $this->setCvFile(uniqid().'.'.$extension); // if there is an error when moving the file, an exception will // be automatically thrown by move(). This will properly prevent // the entity from being persisted to the database on error $this->file->move($this->getUploadRootDir(), $this->cv_file); $this->setCvText(DocReader::readDocxFile($this->getAbsolutePath())); } } /** * @ORM\PrePersist */ public function setCreatedAtValue() { if(!$this->getCreatedAt()) { $this->createdAt = new \DateTime(); } } /** * @ORM\PreUpdate */ public function setUpdatedAtValue() { $this->updatedAt = new \DateTime(); } /** * @ORM\PostPersist */ public function upload() { if (null === $this->file) { return; } unset($this->file); } /** * @ORM\PostRemove */ public function removeUpload() { if ($file = $this->getAbsolutePath()) { unlink($file); } } /** * @ORM\PostRemove */ public function setDeletedAtValue() { if(!$this->getDeletedAt()) { $this->deletedAt = new \DateTime(); } } protected function getUploadDir() { return 'uploads/cvs'; } protected function getUploadRootDir() { return __DIR__.'/../../../../web/'.$this->getUploadDir(); } public function getWebPath() { return null === $this->getCvFile() ? null : $this->getUploadDir().'/'.$this->getCvFile(); } public function getAbsolutePath() { return null === $this->getCvFile()? null : $this->getUploadRootDir().'/'.$this->getCvFile(); } /** * @var \Doctrine\Common\Collections\Collection */ private $skill_candidate; /** * Add skill_candidate * * @param \My\ProjectBundle\Entity\SkillCandidate $skillCandidate * @return Candidate */ public function addSkillCandidate(\My\ProjectBundle\Entity\SkillCandidate $skillCandidate) { $this->skill_candidate[] = $skillCandidate; return $this; } /** * Remove skill_candidate * * @param \My\ProjectBundle\Entity\SkillCandidate $skillCandidate */ public function removeSkillCandidate(\My\ProjectBundle\Entity\SkillCandidate $skillCandidate) { $this->skill_candidate->removeElement($skillCandidate); } /** * Get skill_candidate * * @return \Doctrine\Common\Collections\Collection */ public function getSkillCandidate() { return $this->skill_candidate; } public function __toString() { return $this->getName().' '.$this->getSurname(); } /** * @var string */ private $email; /** * Set email * * @param string $email * @return Candidate */ public function setEmail($email) { $this->email = $email; return $this; } /** * Get email * * @return string */ public function getEmail() { return $this->email; } } 

Answer 1

In your CandidateType class, the DOB field is a text type, in essence it is in the date and time format, you can use something like this

 $builder->add('DOB', 'date', array('input' => 'datetime','label'=>'Date of Birth:')); 

please contact this date Field Type of manual