#ORM\PrePersist is not allowed to be declared on property - php

Question

i have been learning zend framework for the past days now. I have encountered this error when i tried to run the site:
Annotation #ORM\PrePersist is not allowed to be declared on property Post\Entity\Post::$alterado. You may only use this annotation on these code elements: METHOD.
heres my Post.php file:
<?php
namespace Post\Entity;
use Application\Entity\AbstractEntity;
use Doctrine\ORM\Mapping as ORM;
/**
* Post
*
* #ORM\Table(name="post")
* #ORM\Entity
* #ORM\HasLifecycleCallbacks
* #ORM\Entity(repositoryClass="Post\Entity\PostRepository")
*/
class Post extends AbstractEntity
{
/**
* #var integer
* #ORM\Id
* #ORM\Column(name="id", type="integer", nullable=false)
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="titulo", type="string", length=80, nullable=false)
*/
private $titulo;
/**
* #var string
*
* #ORM\Column(name="descricao", type="string", length=150, nullable=false)
*/
private $descricao;
/**
* #var string
*
* #ORM\Column(name="texto", type="text", nullable=false)
*/
private $texto;
/**
* #var \DateTime
*
* #ORM\Column(name="cadastro", type="datetime", nullable=false)
*/
private $cadastro;
/**
* #var \DateTime
* #ORM\PrePersist
* #ORM\Column(name="alterado", type="datetime", nullable=false)
*/
private $alterado;
/**
* #var boolean
* #ORM\PosUpdate
* #ORM\Column(name="ativo", type="boolean", nullable=false)
*/
private $ativo = '0';
/**
* #var \Categoria\Entity\Category
*
* #ORM\ManyToOne(targetEntity="Categoria\Entity\Category")
* #ORM\JoinColumn(name="categoria_id", referencedColumnName="id")
*/
private $categoriaId;
/**
* Set id
*
* #param integer $id
*
* #return Post
*/
public function setId($id)
{
$this->id = $id;
return $this;
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set titulo
*
* #param string $titulo
*
* #return Post
*/
public function setTitulo($titulo)
{
$this->titulo = $titulo;
return $this;
}
/**
* Get titulo
*
* #return string
*/
public function getTitulo()
{
return $this->titulo;
}
/**
* Set descricao
*
* #param string $descricao
*
* #return Post
*/
public function setDescricao($descricao)
{
$this->descricao = $descricao;
return $this;
}
/**
* Get descricao
*
* #return string
*/
public function getDescricao()
{
return $this->descricao;
}
/**
* Set texto
*
* #param string $texto
*
* #return Post
*/
public function setTexto($texto)
{
$this->texto = $texto;
return $this;
}
/**
* Get texto
*
* #return string
*/
public function getTexto()
{
return $this->texto;
}
/**
* Set cadastro
*
* #param \DateTime $cadastro
*
* #return Post
*/
public function setCadastro($cadastro)
{
$this->cadastro = $cadastro;
return $this;
}
/**
* Get cadastro
*
* #return \DateTime
*/
public function getCadastro()
{
return $this->cadastro;
}
/**
* Set alterado
*
* #param \DateTime $alterado
*
* #return Post
*/
public function setAlterado($alterado)
{
$this->alterado = $alterado;
return $this;
}
/**
* Get alterado
*
* #return \DateTime
*/
public function getAlterado()
{
return $this->alterado;
}
/**
* Set ativo
*
* #param boolean $ativo
*
* #return Post
*/
public function setAtivo($ativo)
{
$this->ativo = $ativo;
return $this;
}
/**
* Get ativo
*
* #return boolean
*/
public function getAtivo()
{
return $this->ativo;
}
/**
* Set categoriaId
*
* #param \Categoria\Entity\Category $categoriaId
*
* #return Post
*/
public function setCategoriaId(\Categoria\Entity\Category $categoriaId = null)
{
$this->categoriaId = $categoriaId;
return $this;
}
/**
* Get categoriaId
*
* #return \Categoria\Entity\Category
*/
public function getCategoriaId()
{
return $this->categoriaId;
}
}
Am i missing any "use" statement on the file?
Any help is apreciated, thank you for your atention :)

Answer 1

I fixed it, i should have call #ORM\PrePersist and #ORM\PosUpdate on the method. :)