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<?php
namespace TheCodingMachine\GraphQL\Controllers\Types;
use GraphQL\Type\Definition\Type;
use GraphQL\Type\Schema;
use RuntimeException;
use TheCodingMachine\GraphQL\Controllers\Mappers\CannotMapTypeException;
/**
* Resolves a type by its GraphQL name.
*
* Unlike the TypeMappers, this class can resolve standard GraphQL types (like String, ID, etc...)
*/
class TypeResolver
{
* @var Schema
private $schema;
public function registerSchema(Schema $schema)
$this->schema = $schema;
}
* @param string $typeName
* @return Type
* @throws CannotMapTypeException
public function mapNameToType(string $typeName): Type
if ($this->schema === null) {
throw new RuntimeException('You must register a schema first before resolving types.');
$type = $this->schema->getType($typeName);
if ($type === null) {
throw CannotMapTypeException::createForName($typeName);
return $type;
thecodingmachine /
graphql-controllers
