JMSSerializerBundle RuntimeException: you must define a type for Entity::$field

Question

I'm having this issue with JMSSerializerBundle. It basically gives me an exception for something that I've already done. This is my entity:

Edited to avoid confusion about annotation lines

<?php

namespace My\ProjectBundle\Entity;
use JMS\SerializerBundle\Annotation\Type;

use Doctrine\ORM\Mapping as ORM;

/**
 * My\ProjectBundle\Entity\Music
 * 
 * @ORM\Table()
 * @ORM\Entity(repositoryClass="My\ProjectBundle\Entity\MusicRepository")
 */
class Music extends Post
{
/**
 * @var integer $id
 * 
 * @ORM\Column(name="id", type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
protected $id;

/**
 * @var string $album
 *
 * @ORM\Column(name="album", type="string")
 * @Type("string")
 */
protected $album;

/**
 * @var string $artist
 *
 * @ORM\Column(name="artist", type="string")
 * @Type("string")
 */
protected $artist;

/**
 * @var integer $duration
 *
 * @ORM\Column(name="duration", type="bigint")
 * @Type("int")
 */
protected $duration;

/**
 * @var string $title
 *
 * @ORM\Column(name="title", type="string")
 * @Type("string")
 */
protected $title;

/**
 * @var array $genres
 *
 * @ORM\Column(name="genres", type="array")
 * @Type("array")
 */
protected $genres;

As you can see, I've added @Type() annotations for the fields, but it still gives me the exception when I call:

$listenedMusic = $serializer->deserialize($content, 'My\ProjectBundle\Entity\Music', 'json');

I've checked and the $content variable is not empty and has all the fields mapped in JSON format.

In my Monolog files, this is the exact Exception:

[2012-11-29 23:39:07] request.CRITICAL: JMS\SerializerBundle\Exception\RuntimeException: 
You must define a type for My\ProjectBundle\Entity\Music::$album. (uncaught exception) 
at /vendor/jms/serializer-bundle/JMS/SerializerBundle/Serializer/GenericDeserializationVisitor.php line 177

Why does it still give me this exception?

Answer 1

I'm fairly certain it's because you have two comment strings with different pieces of the whole annotation. Symfony only looks at the comment string directly preceding the class member.

Try replacing:

/** @Type("string")*/
/**
 * @var string $album
 *
 * @ORM\Column(name="album", type="string")*/
protected $album;

with:

/** 
 * @Type("string")
 *
 * @var string $album
 *
 * @ORM\Column(name="album", type="string")*/
protected $album;

(and in every other place you have these duplicate annotation comments)

It's only a guess, but I think it'll fix it. When I tried doing this:

class Something
{
    /**
     * @var integer $id
     * 
     * @ORM\Column(name="id", type="bigint", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    /**
     * 
     */
    private $id;
}

...Symfony gave me this error:

No identifier/primary key specified for Entity 'SomeApp\SomeBundle\Entity\Something'. Every Entity must have an identifier/primary key.