PHP Youshido GraphQL issue with nested fields - php-7

Question

I am using version v1.4.2.18. The library can be found here: https://github.com/Youshido/GraphQL
I am trying to accomplish the following:
query {
articleSummary(id:1) {
title,
body,
article {
id
}
}
}
I have an ArticleSummaryField.php:
class ArticleSummaryField extends AbstractField
{
public function build(FieldConfig $config)
{
$config->addArgument('id', new NonNullType(new StringType()));
}
public function getType()
{
return new ArticleSummaryType();
}
public function resolve($value, array $args, ResolveInfo $info)
{
return [
'title' => 'test title',
'body' => 'test body',
'article' => $args['id']
];
}
}
Then the ArticleSummaryType.php:
class ArticleSummaryType extends AbstractObjectType
{
public function build($config)
{
$config
->addField('title', new StringType());
->addField('body', new StringType());
->addField('article', new ArticleField());
}
}
Then the ArticleField.php has the getType method return the ArticleType which has the id field.
However what i am getting is an error:
Fatal error: Uncaught Error: Call to undefined method ArticleField::getNullableType() in .../vendor/youshido/graphql/src/Execution/Processor.php on line 135
What seems to be happening is that when $targetField->getType() on line 135 in src/Execution/Processor.php is called its returning the ArticleField class, not the ArticleType class.
I would expect that to return the class as declared in the 'getType' method on the ArticleField class.
Am i going about this wrong for nesting fields? Or is there a bug in the library?

Answer 1

To accomplish this you only pass the Field class as the first argument.
class ArticleSummaryType extends AbstractObjectType
{
public function build($config)
{
$config
->addField('title', new StringType());
->addField('body', new StringType());
->addField(new ArticleField());
}
}
Then in the field class you can override getName to set the name for the field as needed or it will use the class name as the field name.