Symfony2 - Association refers to the owning side which does not exist

I'm trying to do mapping associations in symfony2 but I'm having some problems. Here's my code:

OSC\UserBundle\Resources\doctrine\Child.orm.yml

OSC\UserBundle\Entity\Child: type: entity table: null repositoryClass: OSC\UserBundle\Entity\ChildRepository id: id: type: integer id: true generator: strategy: AUTO fields: firstName: type: string length: 255 lastName: type: string length: 255 dateOfBirth: type: datetime column: dateOfBirth isPlayer: type: boolean default: false isCoach: type: boolean default: false ManyToOne: parent: targetEntity: User inversedBy: children lifecycleCallbacks: { } 

OSC\UserBundle\Entity\Child.php

<?php namespace OSC\UserBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * Child */ class Child { /** * @var integer */ private $id; /** * @var string */ private $firstName; /** * @var string */ private $lastName; /** * @var \DateTime */ private $dateOfBirth; protected $isPlayer; protected $isCoach; protected $player; /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set firstName * * @param string $firstName * @return Child */ public function setFirstName($firstName) { $this->firstName = $firstName; return $this; } /** * Get firstName * * @return string */ public function getFirstName() { return $this->firstName; } /** * Set lastName * * @param string $lastName * @return Child */ public function setLastName($lastName) { $this->lastName = $lastName; return $this; } /** * Get lastName * * @return string */ public function getLastName() { return $this->lastName; } /** * Set dateOfBirth * * @param \DateTime $dateOfBirth * @return Child */ public function setDateOfBirth($dateOfBirth) { $this->dateOfBirth = $dateOfBirth; return $this; } /** * Get dateOfBirth * * @return \DateTime */ public function getDateOfBirth() { return $this->dateOfBirth; } /** * Set isPlayer * * @param boolean $isPlayer * @return Child */ public function setIsPlayer($isPlayer) { $this->isPlayer = $isPlayer; return $this; } /** * Get isPlayer * * @return boolean */ public function getIsPlayer() { return $this->isPlayer; } /** * Set isCoach * * @param boolean $isCoach * @return Child */ public function setIsCoach($isCoach) { $this->isCoach = $isCoach; return $this; } /** * Get isCoach * * @return boolean */ public function getIsCoach() { return $this->isCoach; } } 

OSC\UserBundle\Entity\User.orm.yml

OSC\UserBundle\Entity\User: type: entity table: null repositoryClass: OSC\UserBundle\Entity\UserRepository fields: id: type: integer id: true generator: strategy: AUTO lastName: type: string length: 255 firstName: type: string length: 255 streetNumber: type: string length: 255 street: type: string length: 255 province: type: string length: 255 country: type: string length: 255 homePhone: type: string length: 255 mobilePhone: type: string length: 255 isPlayer: type: boolean default: false isCoach: type: boolean default: false dateOfBirth: type: date column: dateOfBirth oneToMany: children: targetEntity: Child mappedBy: parent lifecycleCallbacks: { } 

/

<?php namespace OSC\UserBundle\Entity; use FOS\UserBundle\Entity\User as BaseUser; use Doctrine\ORM\Mapping as ORM; use Symfony\Component\Validator\Constraints as Assert; class User extends BaseUser { protected $id; public function __construct() { parent::__construct(); // your own logic } /** * * @Assert\NotBlank(message="Please enter your last name.", groups={"Registration", "Profile"}) * @Assert\MinLength(limit="3", message="The name is too short.", groups={"Registration", "Profile"}) * @Assert\MaxLength(limit="255", message="The name is too long.", groups={"Registration", "Profile"}) */ protected $lastName; /** * @Assert\NotBlank(message="Please enter your first name.", groups={"Registration", "Profile"}) * @Assert\MinLength(limit="3", message="The name is too short.", groups={"Registration", "Profile"}) * @Assert\MaxLength(limit="255", message="The name is too long.", groups={"Registration", "Profile"}) */ protected $firstName; protected $streetNumber; protected $street; protected $province; protected $country; protected $postalCode; protected $homePhone; protected $mobilePhone; protected $dateOfBirth; protected $children; protected $isPlayer; protected $isCoach; /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set lastName * * @param string $lastName * @return User */ public function setLastName($lastName) { $this->lastName = $lastName; return $this; } /** * Get lastName * * @return string */ public function getLastName() { return $this->lastName; } /** * Set firstName * * @param string $firstName * @return User */ public function setFirstName($firstName) { $this->firstName = $firstName; return $this; } /** * Get firstName * * @return string */ public function getFirstName() { return $this->firstName; } /** * Set streetNumber * * @param string $streetNumber * @return User */ public function setStreetNumber($streetNumber) { $this->streetNumber = $streetNumber; return $this; } /** * Get streetNumber * * @return string */ public function getStreetNumber() { return $this->streetNumber; } /** * Set street * * @param string $street * @return User */ public function setStreet($street) { $this->street = $street; return $this; } /** * Get street * * @return string */ public function getStreet() { return $this->street; } /** * Set province * * @param string $province * @return User */ public function setProvince($province) { $this->province = $province; return $this; } /** * Get province * * @return string */ public function getProvince() { return $this->province; } /** * Set country * * @param string $country * @return User */ public function setCountry($country) { $this->country = $country; return $this; } /** * Get country * * @return string */ public function getCountry() { return $this->country; } /** * Set homePhone * * @param string $homePhone * @return User */ public function setHomePhone($homePhone) { $this->homePhone = $homePhone; return $this; } /** * Get homePhone * * @return string */ public function getHomePhone() { return $this->homePhone; } /** * Set mobilePhone * * @param string $mobilePhone * @return User */ public function setMobilePhone($mobilePhone) { $this->mobilePhone = $mobilePhone; return $this; } /** * Get mobilePhone * * @return string */ public function getMobilePhone() { return $this->mobilePhone; } /** * Add children * * @param \OSC\UserBundle\Entity\Children $children * @return User */ public function addChild(\OSC\UserBundle\Entity\Children $children) { $this->children[] = $children; return $this; } /** * Remove children * * @param \OSC\UserBundle\Entity\Children $children */ public function removeChild(\OSC\UserBundle\Entity\Children $children) { $this->children->removeElement($children); } /** * Get children * * @return \Doctrine\Common\Collections\Collection */ public function getChildren() { return $this->children; } /** * Set isPlayer * * @param boolean $isPlayer * @return User */ public function setIsPlayer($isPlayer) { $this->isPlayer = $isPlayer; return $this; } /** * Get isPlayer * * @return boolean */ public function getIsPlayer() { return $this->isPlayer; } /** * Set isCoach * * @param boolean $isCoach * @return User */ public function setIsCoach($isCoach) { $this->isCoach = $isCoach; return $this; } /** * Get isCoach * * @return boolean */ public function getIsCoach() { return $this->isCoach; } /** * Set dateOfBirth * * @param \DateTime $dateOfBirth * @return User */ public function setDateOfBirth($dateOfBirth) { $this->dateOfBirth = $dateOfBirth; return $this; } /** * Get dateOfBirth * * @return \DateTime */ public function getDateOfBirth() { return $this->dateOfBirth; } } 

My question is the following

When I run the command: doctrine:schema:validate

why am I getting the following error:

[Mapping] FAIL - The entity-class 'OSC\UserBundle\Entity\User' mapping is invalid: * The association OSC\UserBundle\Entity\User#children refers to the owning side field OSC\UserBundle\Entity\Child#parent which does not exist.

I'm feeling this is linked to parent not being defined in Child. However, when I run doctrine:generate:entities OSC parent is not added....