Is it possible to override serialization of EnumType?

[alleknalle]

Q	A
Bug report?	no
Feature request?	no
BC Break report?	no
RFC?	no
Version/Branch	0.15.0

Hi there,

I am trying to use an Enum which in my PHP code is a Collection with Value objects. When trying to parse the Collection as Enum I get the following error:

"debugMessage": "Expected a value of type \"ContentRating\" but received: COARSE_LANGUAGE",
"trace": [
{
	"file": "\/var\/www\/vendor\/webonyx\/graphql-php\/src\/Executor\/ReferenceExecutor.php",
	"line": 786,
	"call": "GraphQL\\Executor\\ReferenceExecutor::completeLeafValue(GraphQLType: ContentRating, instance of App\\BoxedScalar\\ContentRating)"
},

I'm using the graphql config where my schema is as follows:

type MediaItem {
    contentRatings: [ContentRating],
}

enum ContentRating {
    DISCRIMINATION,
    COARSE_LANGUAGE,
    FEAR,
    VIOLENCE,
    SEX,
    DRUGS_AND_ALCOHOL
}

It looks like it can't correctly find the correct value in the serialization process of the EnumType. I would like to change the way of serialization for the EnumType, since the following code works:

public function serialize($value)
{
    $lookup = $this->getValueLookup();
    // start added code
    if($value instanceof ContentRating) {
        $value = $value->getValue();
    }
    // end added code
    if (isset($lookup[$value])) {
        return $lookup[$value]->name;
    }

    throw new Error('Cannot serialize value as enum: ' . Utils::printSafe($value));
}

I'm using the ResolverMap for my resolvers.

Can you tell me if it's possible to override the serialization process of an EnumType somehow?

It looks like the problem is here because I use a Collection class for this Enum in my Entity that stores the ContentRating objects.

Hope you can help.