Symfony2/Doctrine One-To-Many: Class integer does not exist - php

Question

I have a one-to-many self referencing entity. Everything works fine as long as the parent value is set to null. When I set the parent item to something actually in the list, I get the error:
Class integer does not exist
500 Internal Server Error - ReflectionException
Here is the code for my entity:
<?php
namespace WorkRecorder\WorkBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity(repositoryClass="WorkRecorder\WorkBundle\Repository\WorkRepository")
* #ORM\Table(name="strategyUsed")
*/
class StrategyUsed
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(type="integer")
*/
protected $sortOrder;
/**
* #ORM\Column(type="string", length=50)
*/
protected $name;
/**
* #ORM\Column(type="text")
*/
protected $description;
/**
* #ORM\OneToMany(targetEntity="StrategyUsed", mappedBy="parent")
*/
private $children;
/**
* #ORM\ManyToOne(targetEntity="StrategyUsed", inversedBy="children")
* #ORM\JoinColumn(name="parent_id", referencedColumnName="id")
*/
private $parent;
public function __construct() {
$this->children = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
*/
public function setName($name)
{
$this->name = $name;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set description
*
* #param text $description
*/
public function setDescription($description)
{
$this->description = $description;
}
/**
* Get description
*
* #return text
*/
public function getDescription()
{
return $this->description;
}
/**
* Set sortOrder
*
* #param integer $sortOrder
*/
public function setSortOrder(\integer $sortOrder)
{
$this->sortOrder = $sortOrder;
}
/**
* Get sortOrder
*
* #return integer
*/
public function getSortOrder()
{
return $this->sortOrder;
}
/**
* Add children
*
* #param WorkRecorder\WorkBundle\Entity\StrategyUsed $children
*/
public function addStrategyUsed(\WorkRecorder\WorkBundle\Entity\StrategyUsed $children)
{
$this->children[] = $children;
}
/**
* Get children
*
* #return Doctrine\Common\Collections\Collection
*/
public function getChildren()
{
return $this->children;
}
/**
* Set parent
*
* #param WorkRecorder\WorkBundle\Entity\StrategyUsed $parent
*/
public function setParent(\WorkRecorder\WorkBundle\Entity\StrategyUsed $parent)
{
$this->parent = $parent;
}
/**
* Get parent
*
* #return WorkRecorder\WorkBundle\Entity\StrategyUsed
*/
public function getParent()
{
return $this->parent;
}
}
What am I doing wrong?

Answer 1

You can't type hint on a scalar type (integer/string/boolean etc) in PHP. e.g.
public function setSortOrder(\integer $sortOrder)
Should be:
public function setSortOrder($sortOrder)
You can validate the type of the value within the method and perhaps throw an InvalidArgumentException if passed something that isn't an integer.