Error in Symfony 2 when create object of child entity class - php

Question

I have a file /src/AppBundle/Entity/Questionnaire.php with 3 Entity classes, where I'm trying to implement Single table inheritance with Doctrine 2 on Symfony 2.7. Questionnaire is a parent abstract class, and there are 2 child classes FirstQuestions and SecondsQuestions that extends Questionnaire. I choosed this model because I need to write data in table in 2 steps. The code of this file is below:
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Questionnaire
*
* #ORM\Entity
* #ORM\Table(name="questionnaire")
* #ORM\InheritanceType("SINGLE_TABLE")
* #ORM\DiscriminatorColumn(name="discr", type="string")
* #ORM\DiscriminatorMap({"firstquestions" = "FirstQuestions", "secondquestions" = "SecondQuestions"})
*/
abstract class Questionnaire {
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
}
/**
* FirstQuestions
*/
class FirstQuestions extends Questionnaire {
/**
* #var string
*
* #ORM\Column(name="firstName", type="string", length=64)
*/
private $firstName;
/**
* #var string
*
* #ORM\Column(name="lastName", type="string", length=64)
*/
private $lastName;
/**
* #var string
*
* #ORM\Column(name="email", type="string", length=32)
*/
private $email;
/**
* #var \DateTime
*
* #ORM\Column(name="birthday", type="date")
*/
private $birthday;
/**
* #var integer
*
* #ORM\Column(name="shoeSize", type="integer")
*/
private $shoeSize;
/**
* Set firstName
*
* #param string $firstName
*
* #return Questionnaire
*/
public function setFirstName($firstName)
{
$this->firstName = $firstName;
return $this;
}
/**
* Get firstName
*
* #return string
*/
public function getFirstName()
{
return $this->firstName;
}
/**
* Set lastName
*
* #param string $lastName
*
* #return Questionnaire
*/
public function setLastName($lastName)
{
$this->lastName = $lastName;
return $this;
}
/**
* Get lastName
*
* #return string
*/
public function getLastName()
{
return $this->lastName;
}
/**
* Set email
*
* #param string $email
*
* #return Questionnaire
*/
public function setEmail($email)
{
$this->email = $email;
return $this;
}
/**
* Get email
*
* #return string
*/
public function getEmail()
{
return $this->email;
}
/**
* Set birthday
*
* #param \DateTime $birthday
*
* #return Questionnaire
*/
public function setBirthday($birthday)
{
$this->birthday = $birthday;
return $this;
}
/**
* Get birthday
*
* #return \DateTime
*/
public function getBirthday()
{
return $this->birthday;
}
/**
* Set shoeSize
*
* #param integer $shoeSize
*
* #return Questionnaire
*/
public function setShoeSize($shoeSize)
{
$this->shoeSize = $shoeSize;
return $this;
}
/**
* Get shoeSize
*
* #return integer
*/
public function getShoeSize()
{
return $this->shoeSize;
}
}
/**
* SecondQuestions
*/
class SecondQuestions extends Questionnaire {
/**
* #var string
*
* #ORM\Column(name="favoriteIceCream", type="string", length=128)
*/
private $favoriteIceCream;
/**
* #var string
*
* #ORM\Column(name="favoriteSuperHero", type="string", length=32)
*/
private $favoriteSuperHero;
/**
* #var string
*
* #ORM\Column(name="favoriteMovieStar", type="string", length=64)
*/
private $favoriteMovieStar;
/**
* #var \DateTime
*
* #ORM\Column(name="endOfTheWorld", type="date")
*/
private $endOfTheWorld;
/**
* #var string
*
* #ORM\Column(name="superBowlWinner", type="string", length=32)
*/
private $superBowlWinner;
/**
* Set favoriteIceCream
*
* #param string $favoriteIceCream
*
* #return Questionnaire
*/
public function setFavoriteIceCream($favoriteIceCream)
{
$this->favoriteIceCream = $favoriteIceCream;
return $this;
}
/**
* Get favoriteIceCream
*
* #return string
*/
public function getFavoriteIceCream()
{
return $this->favoriteIceCream;
}
/**
* Set favoriteSuperHero
*
* #param string $favoriteSuperHero
*
* #return Questionnaire
*/
public function setFavoriteSuperHero($favoriteSuperHero)
{
$this->favoriteSuperHero = $favoriteSuperHero;
return $this;
}
/**
* Get favoriteSuperHero
*
* #return string
*/
public function getFavoriteSuperHero()
{
return $this->favoriteSuperHero;
}
/**
* Set favoriteMovieStar
*
* #param string $favoriteMovieStar
*
* #return Questionnaire
*/
public function setFavoriteMovieStar($favoriteMovieStar)
{
$this->favoriteMovieStar = $favoriteMovieStar;
return $this;
}
/**
* Get favoriteMovieStar
*
* #return string
*/
public function getFavoriteMovieStar()
{
return $this->favoriteMovieStar;
}
/**
* Set endOfTheWorld
*
* #param \DateTime $endOfTheWorld
*
* #return Questionnaire
*/
public function setEndOfTheWorld($endOfTheWorld)
{
$this->endOfTheWorld = $endOfTheWorld;
return $this;
}
/**
* Get endOfTheWorld
*
* #return \DateTime
*/
public function getEndOfTheWorld()
{
return $this->endOfTheWorld;
}
/**
* Set superBowlWinner
*
* #param string $superBowlWinner
*
* #return Questionnaire
*/
public function setSuperBowlWinner($superBowlWinner)
{
$this->superBowlWinner = $superBowlWinner;
return $this;
}
/**
* Get superBowlWinner
*
* #return string
*/
public function getSuperBowlWinner()
{
return $this->superBowlWinner;
}
}
So the problem is when I'm trying to create object of child class(FirstQuestions or SecondsQuestions) in method of controller, Symfony displays me error "500 Internal Server Error". The code of controller with method is below:
namespace AppBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use AppBundle\Entity\Questionnaire;
use AppBundle\Entity\FirstQuestions;
use AppBundle\Entity\SecondQuestions;
class TestController extends Controller
{
/**
* #Route("/test", name="test")
*/
public function indexAction(Request $request)
{
$item = new FirstQuestions(); // everything works well without this line
return new Response(
'ok'
);
}
}
Maybe I am doing something wrong or didn't set any important annotation. Can anyone help me?

Answer 1

This will be one of those annoying little oversight errors - an extra semi-colon or something somewhere that you're not looking for it. I'm creating this additional answer so that I can give you exactly the code I'm using. Hopefully, you'll be able to cut-and-paste, replace your own files with this new code, and it will magically start working.
First - to prove the point, here's my (modified) output:
Veromo\Bundle\CoreBundle\Entity\FirstQuestions Object
(
[firstName:Veromo\Bundle\CoreBundle\Entity\FirstQuestions:private] =>
[lastName:Veromo\Bundle\CoreBundle\Entity\FirstQuestions:private] =>
[email:Veromo\Bundle\CoreBundle\Entity\FirstQuestions:private] =>
[birthday:Veromo\Bundle\CoreBundle\Entity\FirstQuestions:private] =>
[shoeSize:Veromo\Bundle\CoreBundle\Entity\FirstQuestions:private] =>
[id:Veromo\Bundle\CoreBundle\Entity\Questionnaire:private] =>
)
Which shows that all I'm doing differently to you is using my own dev environment's namespaces.
AppBundle\Entity\Questionnaire.php
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Questionnaire
*
* #ORM\Entity
* #ORM\Table(name="questionnaire")
* #ORM\InheritanceType("SINGLE_TABLE")
* #ORM\DiscriminatorColumn(name="discr", type="string")
* #ORM\DiscriminatorMap({"questionnaire"="Questionnaire", "firstquestions" = "FirstQuestions", "secondquestions" = "SecondQuestions"})
*/
abstract class Questionnaire {
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
}
AppBundle\Entity\FirstQuestions.php
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* FirstQuestions
* #ORM\Entity()
*/
class FirstQuestions extends Questionnaire {
/**
* #var string
*
* #ORM\Column(name="firstName", type="string", length=64)
*/
private $firstName;
/**
* #var string
*
* #ORM\Column(name="lastName", type="string", length=64)
*/
private $lastName;
/**
* #var string
*
* #ORM\Column(name="email", type="string", length=32)
*/
private $email;
/**
* #var \DateTime
*
* #ORM\Column(name="birthday", type="date")
*/
private $birthday;
/**
* #var integer
*
* #ORM\Column(name="shoeSize", type="integer")
*/
private $shoeSize;
/**
* Set firstName
*
* #param string $firstName
*
* #return Questionnaire
*/
public function setFirstName($firstName)
{
$this->firstName = $firstName;
return $this;
}
/**
* Get firstName
*
* #return string
*/
public function getFirstName()
{
return $this->firstName;
}
/**
* Set lastName
*
* #param string $lastName
*
* #return Questionnaire
*/
public function setLastName($lastName)
{
$this->lastName = $lastName;
return $this;
}
/**
* Get lastName
*
* #return string
*/
public function getLastName()
{
return $this->lastName;
}
/**
* Set email
*
* #param string $email
*
* #return Questionnaire
*/
public function setEmail($email)
{
$this->email = $email;
return $this;
}
/**
* Get email
*
* #return string
*/
public function getEmail()
{
return $this->email;
}
/**
* Set birthday
*
* #param \DateTime $birthday
*
* #return Questionnaire
*/
public function setBirthday($birthday)
{
$this->birthday = $birthday;
return $this;
}
/**
* Get birthday
*
* #return \DateTime
*/
public function getBirthday()
{
return $this->birthday;
}
/**
* Set shoeSize
*
* #param integer $shoeSize
*
* #return Questionnaire
*/
public function setShoeSize($shoeSize)
{
$this->shoeSize = $shoeSize;
return $this;
}
/**
* Get shoeSize
*
* #return integer
*/
public function getShoeSize()
{
return $this->shoeSize;
}
}
AppBundle\Entity\SecondQuestions.php
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* SecondQuestions
* #ORM\Entity()
*/
class SecondQuestions extends Questionnaire {
/**
* #var string
*
* #ORM\Column(name="favoriteIceCream", type="string", length=128)
*/
private $favoriteIceCream;
/**
* #var string
*
* #ORM\Column(name="favoriteSuperHero", type="string", length=32)
*/
private $favoriteSuperHero;
/**
* #var string
*
* #ORM\Column(name="favoriteMovieStar", type="string", length=64)
*/
private $favoriteMovieStar;
/**
* #var \DateTime
*
* #ORM\Column(name="endOfTheWorld", type="date")
*/
private $endOfTheWorld;
/**
* #var string
*
* #ORM\Column(name="superBowlWinner", type="string", length=32)
*/
private $superBowlWinner;
/**
* Set favoriteIceCream
*
* #param string $favoriteIceCream
*
* #return Questionnaire
*/
public function setFavoriteIceCream($favoriteIceCream)
{
$this->favoriteIceCream = $favoriteIceCream;
return $this;
}
/**
* Get favoriteIceCream
*
* #return string
*/
public function getFavoriteIceCream()
{
return $this->favoriteIceCream;
}
/**
* Set favoriteSuperHero
*
* #param string $favoriteSuperHero
*
* #return Questionnaire
*/
public function setFavoriteSuperHero($favoriteSuperHero)
{
$this->favoriteSuperHero = $favoriteSuperHero;
return $this;
}
/**
* Get favoriteSuperHero
*
* #return string
*/
public function getFavoriteSuperHero()
{
return $this->favoriteSuperHero;
}
/**
* Set favoriteMovieStar
*
* #param string $favoriteMovieStar
*
* #return Questionnaire
*/
public function setFavoriteMovieStar($favoriteMovieStar)
{
$this->favoriteMovieStar = $favoriteMovieStar;
return $this;
}
/**
* Get favoriteMovieStar
*
* #return string
*/
public function getFavoriteMovieStar()
{
return $this->favoriteMovieStar;
}
/**
* Set endOfTheWorld
*
* #param \DateTime $endOfTheWorld
*
* #return Questionnaire
*/
public function setEndOfTheWorld($endOfTheWorld)
{
$this->endOfTheWorld = $endOfTheWorld;
return $this;
}
/**
* Get endOfTheWorld
*
* #return \DateTime
*/
public function getEndOfTheWorld()
{
return $this->endOfTheWorld;
}
/**
* Set superBowlWinner
*
* #param string $superBowlWinner
*
* #return Questionnaire
*/
public function setSuperBowlWinner($superBowlWinner)
{
$this->superBowlWinner = $superBowlWinner;
return $this;
}
/**
* Get superBowlWinner
*
* #return string
*/
public function getSuperBowlWinner()
{
return $this->superBowlWinner;
}
}
AppBundle\Controller\TestController.php
<?php
namespace AppBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use AppBundle\Entity\Questionnaire;
use AppBundle\Entity\FirstQuestions;
use AppBundle\Entity\SecondQuestions;
class TestController extends Controller
{
/**
* #Route("/test",name="test")
*/
public function indexAction( Request $request )
{
$item = new FirstQuestions();
return new Response(
'<pre>'.print_r( $item, true ).'</pre>'
);
}
}
And just to be sure ...
app\config\routing.yml
test:
resource: "#AppBundle/Controller/TestController.php"
type: annotation
It's GOT to be some stupid, annoying little error that nobody is looking for.
Hope this helps ...

Answer 2

ALL Entity classes which are part of the mapped entity hierarchy need to be specified in the #DiscriminatorMap. So, yes, your annotation is incorrect.
Doctrine Single Table Inheritance
EDIT
You have another annotations error - neither of your subclasses has an #Entity annotation:
/**
* FirstQuestions
* #ORM\Entity()
*/
class FirstQuestions extends Questionnaire {
/**
* SecondQuestions
* #ORM\Entity()
*/
class SecondQuestions extends Questionnaire {
After fixing this I was able to use Doctrine's Schema Update tool to build the tables AND successfully created a FirstQuestions object.