for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php
declare(strict_types=1);
namespace GraphQL\Validator\Rules;
use GraphQL\Error\Error;
use GraphQL\Language\AST\NodeKind;
use GraphQL\Language\AST\ObjectFieldNode;
use GraphQL\Language\Visitor;
use GraphQL\Validator\ValidationContext;
use function array_pop;
use function sprintf;
class UniqueInputFieldNames extends ValidationRule
{
/** @var string[] */
public $knownNames;
/** @var string[][] */
public $knownNameStack;
public function getVisitor(ValidationContext $context)
$this->knownNames = [];
$this->knownNameStack = [];
return [
NodeKind::OBJECT => [
'enter' => function () {
$this->knownNameStack[] = $this->knownNames;
},
'leave' => function () {
$this->knownNames = array_pop($this->knownNameStack);
],
NodeKind::OBJECT_FIELD => function (ObjectFieldNode $node) use ($context) {
$fieldName = $node->name->value;
if (! empty($this->knownNames[$fieldName])) {
$context->reportError(new Error(
self::duplicateInputFieldMessage($fieldName),
[$this->knownNames[$fieldName], $node->name]
));
} else {
$this->knownNames[$fieldName] = $node->name;
}
return Visitor::skipNode();
];
public static function duplicateInputFieldMessage($fieldName)
return sprintf('There can be only one input field named "%s".', $fieldName);
webonyx /
graphql-php
