A circular reference has been detected (configured limit: 1) Serializer SYMFONY [duplicate] - json

Question

I am using Doctrine 2 and Zend framework since a few days.
I am generating my entities across yaml files.
Now I met an issue to convert my entities Doctrine into Json format (in order to use it through AJAX).
Here is the code used :
$doctrineobject = $this->entityManager->getRepository('\Entity\MasterProduct')->find($this->_request->id);
$serializer = new \Symfony\Component\Serializer\Serializer(array(new Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer()), array('json' => new Symfony\Component\Serializer\Encoder\JsonEncoder()));
$reports = $serializer->serialize($doctrineobject, 'json');
below is the return I get :
Fatal error: Maximum function nesting level of '100' reached, aborting! in /Users/Sites/library/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php on line 185
the issue seems to be the same than here :
http://comments.gmane.org/gmane.comp.php.symfony.symfony2/2659
but there is not proper solution proposed.
Any idea how can I do it ?
Cheers

Answer 1

I solved the same problem by writing my own GetSetNormalizer my class. Defined static variable in a class for branching
class LimitedRecursiveGetSetMethodNormalizer extends GetSetMethodNormalizer
{
public static $limit=2;
/**
* {#inheritdoc}
*/
public function normalize($object, $format = null)
{
$reflectionObject = new \ReflectionObject($object);
$reflectionMethods = $reflectionObject->getMethods(\ReflectionMethod::IS_PUBLIC);
$attributes = array();
foreach ($reflectionMethods as $method) {
if ($this->isGetMethod($method)) {
$attributeName = strtolower(substr($method->name, 3));
$attributeValue = $method->invoke($object);
if (null !== $attributeValue && !is_scalar($attributeValue) && LimitedRecursiveGetSetMethodNormalizer::$limit>0) {
LimitedRecursiveGetSetMethodNormalizer::$limit--;
$attributeValue = $this->serializer->normalize($attributeValue, $format);
LimitedRecursiveGetSetMethodNormalizer::$limit++;
}
$attributes[$attributeName] = $attributeValue;
}
}
return $attributes;
}
/**
* Checks if a method's name is get.* and can be called without parameters.
*
* #param ReflectionMethod $method the method to check
* #return Boolean whether the method is a getter.
*/
private function isGetMethod(\ReflectionMethod $method)
{
return (
0 === strpos($method->name, 'get') &&
3 < strlen($method->name) &&
0 === $method->getNumberOfRequiredParameters()
);
}
}
And usage
LimitedRecursiveGetSetMethodNormalizer::$limit=3;
$serializer = new Serializer(array(new LimitedRecursiveGetSetMethodNormalizer()), array('json' => new
JsonEncoder()));
$response =new Response($serializer->serialize($YOUR_OBJECT,'json'));

Answer 2

JMSSerializerBundle seems to handle circular references fine.