FOSRestBundle: partial response in function of attributes asked in the request

My implementation based on Igor's answer:

ExlusionStrategy:

use JMS\Serializer\Exclusion\ExclusionStrategyInterface;use JMS\Serializer\Metadata\ClassMetadata;use JMS\Serializer\Metadata\PropertyMetadata;use JMS\Serializer\Context;class FieldsExclusionStrategy implements ExclusionStrategyInterface {    private $fields = array();    public function __construct(array $fields) {        $this->fields = $fields;    }    public function shouldSkipClass(ClassMetadata $metadata, Context $navigatorContext) {        return false;    }    public function shouldSkipProperty(PropertyMetadata $property, Context $navigatorContext) {        if (empty($this->fields)) {            return false;        }        if (in_array($property->name, $this->fields)) {            return false;        }        return true;    }}

Controller:

/** * @View * @QueryParam(name="fields") * * GET /users/{id} * * @param integer $user (uses ParamConverter) */public function getUserAction(User $user, $fields) {    $context = new SerializationContext();    $context->addExclusionStrategy(new FieldsExclusionStrategy($fields ? explode(',', $fields) : array()));    return $this->handleView($this->view($user)->setSerializationContext($context));}

Endpoint:

GET /users/{id}?fields=id,username,sex

You can do it like that through groups, as you've shown. Maybe a bit more elegant solution would be to implement your own ExclusionStrategy. @Groups and other are implementations of ExclusionStrategyInterface too.

So, say you called your strategy SelectFieldsStrategy. Once you implement it, you can add it to your serialization context very easy:

$context = new SerializationContext();$context->addExclusionStrategy(new SelectFieldsStrategy(['id', 'name', 'someotherfield']));