Youshido / GraphQL

        $currentType  = $queryType->getNullableType();

        if ($currentType->getKind() == TypeMap::KIND_SCALAR) {

            if (!$query->hasFields()) {

                return $this->getOutputValue($currentType, $resolvedValue);

            } else {

                $this->executionContext->addError(new ResolveException(sprintf('Fields are not found in query "%s"', $query->getName())));

                return null;

            }

        }

        foreach ($query->getFields() as $fieldAst) {

        }

        $fieldType = $this->resolveTypeIfAbstract($fieldType->getNullableType(), $value);

        if (!$fieldType->isValidValue($value)) {

            $this->executionContext->addError(new ResolveException(sprintf('Not valid value for %s field %s', $fieldType->getNullableType()->getKind(), $field->getName())));

            return false;

        }

        return true;

    }