Doctrine2 export entity to array

Question

I have `Product` entity with many-to-one to `Category` entity. I need store `Product` in session. First of all i try to implement `\Serializable` interface on Product. How should i serialize my related `Category` entity? Should i also implement `\Serializable` interface? I read, that serialization in doctrine is very pain operation and i think about this: Can we get raw values from entity? Exactly that data, which stored in database. If we can get this values, we can store it anywhere and recreate object! I read doctrine2 code and find method `Doctrine\ORM\Internal\Hydration\ObjectHydrator:hydrateRowData` but it's protected. Is there any public api for doing this? Update: I just copypaste and integrate some code from BasicEntityPersister and it seems to work. ``` $product = $productsRepository->find($id); if (!$product) { throw $this->createNotFoundException('No product found for id ' . $id); } $uow = $em->getUnitOfWork(); $entityPersister = $uow->getEntityPersister(get_class($product…

Accepted Answer

```
<?php

namespace Acme\ServiceBundle\Services;

use Doctrine\ORM\EntityManager;

class EntitySerializer
{
    protected $em;

public function __construct(EntityManager $em)
    {
        $this->em = $em;
    }

public function serialize($entity)
    {
        $className = get_class($entity);

$uow = $this->em->getUnitOfWork();
        $entityPersister = $uow->getEntityPersister($className);
        $classMetadata = $entityPersister->getClassMetadata();

$result = array();
        foreach ($uow->getOriginalEntityData($entity) as $field => $value) {
            if (isset($classMetadata->associationMappings[$field])) {
                $assoc = $classMetadata->associationMappings[$field];

// Only owning side of x-1 associations can have a FK column.
                if ( ! $assoc['isOwningSide'] || ! ($assoc['type'] & \Doctrine\ORM\Mapping\ClassMetadata::TO_ONE)) {
                    continue;
                }

if ($value !== null) {
                    $newValId = $uow->getEntityIdentifier($value);
                }

$targetClass = $this->em->getClassMetadata($assoc['targetEntity']);
                $owningTable = $entityPersister->getOwningTable($field);

foreach ($assoc['joinColumns'] as $joinColumn) {
                    $sourceColumn = $joinColumn['name'];
                    $targetColumn = $joinColumn['referencedColumnName'];

if ($value === null) {
                        $result[$sourceColumn] = null;
                    } else if ($targetClass->containsForeignIdentifier) {
                        $result[$sourceColumn] = $newValId[$targetClass->getFieldForColumn($targetColumn)];
                    } else {
                        $result[$sourceColumn] = $newValId[$targetClass->fieldNames[$targetColumn]];
                    }
                }
            } elseif (isset($classMetadata->columnNames[$field])) {
                $columnName = $classMetadata->columnNames[$field];
                $result[$columnName] = $value;
            }
        }

return array($className, $result);
    }

public function deserialize(Array $data)
    {
        list($class, $result) = $data;

$uow = $this->em->getUnitOfWork();
        return $uow->createEntity($class, $result);
    }
}
```

Doctrine2 export entity to array

Solution

Problem