Symfony & Doctrine: Undefined index when trying to access one-to-many - php

Question

Im having a bit of problems.
I have 2 classes:
Carorder:
<?php
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use AppBundle\Entity\Orderdetail;
/**
* #ORM\Entity
* #ORM\Table(name="carorder")
*/
class Carorder
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue
*/
protected $id;
/**
* #ORM\OneToMany(targetEntity="Orderdetail", mappedBy="Carorder", cascade={"persist","remove"})
**/
protected $orderdetails;
//Then all the auto genereted setters and getters beneath here
Orderdetail:
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/** #ORM\Entity
* #ORM\Table(name="orderdetail")
*/
class Orderdetail
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue
*/
protected $id;
/**
* #ORM\ManyToOne(targetEntity="Carorder", inversedBy="orderdetails")
**/
protected $carorder;
/**
* #ORM\Column(type="integer")
*/
protected $amount;
//Then all the auto generated setters and getters beneath here
I can't access the orderdetail through the Carorder. For example this example, just thorws the
Undefined index: Carorder
Example:
$repository = $this->getDoctrine()->getRepository('AppBundle:Carorder');
$orders = $repository->findAll();
$orderdetail = $orders[0]->getOrderdetails()->first();
I have no idea what is causing this, so i hoped you guys could help me out.

Answer 1

You mapped the property Carorder but your property name is carorder, it's case sensitive.
A correct mapping could be:
/**
* #ORM\OneToMany(targetEntity="Orderdetail", mappedBy="carorder", cascade={"persist","remove"})
**/
protected $orderdetails;