How do I create a custom exclusion strategy for JMS Serializer that allows me to make run-time decisions about whether to include a particular field?

Question

As the title says, I am trying to make a run-time decision on whether or not to include fields in the serialization. In my case, this decision will be based on permissions.<

Answer 1

You just have to create a class that implements JMS\Serializer\Exclusion\ExclusionStrategyInterface

In your case, you can implement your own custom logic in the shouldSkipProperty method and always return false for shouldSkipClass.

Example of implementation can be found in the JMS/Serializer repository

We will reference the created service as acme.my_exclusion_strategy_service below.

---

In your controller action:

addExclusionStrategy($this->get('acme.my_exclusion_strategy_service'));

$serial = $this->get('jms_serializer')->serialize($object, 'json', $context);

return new Response($serial, Response::HTTP_OK, array('Content-Type' => 'application/json'));

Or if you are using FOSRestBundle

addExclusionStrategy($this->get('acme.my_exclusion_strategy_service'))

$view = new View($object);
$view->setSerializationContext($context);

// or you can create your own view factory that handles the creation
// of the context for you

return $this->get('fos_rest.view_handler')->handle($view);