flush() doesn't update embed documents - mongodb

Question

I have this classes:
class Country
{
/**
* #MongoDB\Id
*/
protected $id;
/**
* #MongoDB\String
*/
protected $iso;
/**
* #MongoDB\EmbedOne(targetDocument="Localstring")
*/
protected $name;
public function __construct(){
$this->name = new Localstring();
}
}
class Localstring
{
/**
* #MongoDB\Id
*/
private $id;
/**
* #MongoDB\Hash
*/
private $location = array();
}
I want to update every country with a new translation:
$dm = $this->get('doctrine_mongodb')
->getManager();
foreach ($json as $iso => $name) {
$country = $dm->getRepository('ExampleCountryBundle:Country')->findOneByIso($iso);
$localstring_name = $country->getName();
$localstring_name->addTranslation('es_ES', $name);
$dm->flush();
}
If I print one object just before flushing it prints correctly:
Example\CountryBundle\Document\Country Object ( [id:protected] => 541fe9c678f965b321241121 [iso:protected] => AF [name:protected] => Example\CountryBundle\Document\Localstring Object ( [id:Example\CountryBundle\Document\Localstring:private] => 541fe9c678f965b321241122 [location:Example\CountryBundle\Document\Localstring:private] => Array ( [en_EN] => Afghanistan [es_ES] => Afganistán ) ) )
But on database it doesn't updates. I tried updating $iso and it works. Why this happens?

Answer 1

You forgot to persist your object. flush() just pushes into DB your changes that were registered by persist() (called with your object in argument). It needs to be here because you doesn't change your document. You just added the translation. This functionality covered by Translatable extension and doesn't tell to the Doctrine that your object was modified. And when Doctrine will prepare the changelist for query it will not find changes and will not create the query.
Your code should look like this:
$dm = $this->get('doctrine_mongodb')
->getManager();
foreach ($json as $iso => $name) {
$country = $dm->getRepository('ExampleCountryBundle:Country')->findOneByIso($iso);
$localstring_name = $country->getName();
$localstring_name->addTranslation('es_ES', $name);
$dm->persist($country);
}
$dm->flush();

Answer 2

you forgot the persist your object!
try this at the end of your foreach: $dm->persist($your_object);
and outside form foreach put the $dm->flush();