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<?php
declare(strict_types=1);
namespace GraphQLTests\Doctrine\Blog\Types;
use DateTime;
use GraphQL\Error\Error;
use GraphQL\Language\AST\StringValueNode;
use GraphQL\Type\Definition\ScalarType;
use GraphQL\Utils;
class DateTimeType extends ScalarType
{
public function parseLiteral($valueNode)
// Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL
// error location in query:
if (!($valueNode instanceof StringValueNode)) {
throw new Error('Query error: Can only parse strings got: ' . $valueNode->kind, [$valueNode]);
}
return $valueNode->value;
public function parseValue($value)
if (!is_string($value)) {
throw new \UnexpectedValueException('Cannot represent value as DateTime date: ' . Utils::printSafe($value));
return new DateTime($value);
public function serialize($value)
if ($value instanceof DateTime) {
return $value->format('c');
return $value;
Ecodev /
graphql-doctrine
