Drupal 10: Argument Value Resolver Via Compiler Pass Type Error: A Comprehensive Guide
Problem: You're trying to implement a custom argument value resolver in Drupal 10 using a compiler pass, but you encounter a type error, leaving you scratching your head.
Rephrased: Imagine you're building a new feature in Drupal 10 and need to handle custom data when a specific route is accessed. You're using a powerful technique called a "compiler pass" to inject your logic into the core Drupal system. However, the compiler pass is throwing an error, preventing your custom argument resolver from working properly.
Let's dive into the solution.
Scenario and Code Example:
Let's say you want to handle a custom "user_id" argument in your route. You've created a custom argument value resolver, MyUserIdResolver, and implemented it through a compiler pass:
<?php
namespace Drupal\my_module\Compiler;
use Drupal\Core\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Reference;
class MyUserIdResolverCompilerPass implements CompilerPassInterface {
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container) {
$definition = $container->getDefinition('router.argument_value_resolvers');
$definition->addMethodCall('add', [
'user_id',
new Reference('my_module.my_user_id_resolver'),
]);
}
}
Analysis and Clarification:
The error you're likely encountering arises from a change in Drupal 10 related to argument value resolvers. Drupal 10 requires argument value resolvers to implement the \Drupal\Core\Routing\ArgumentValueResolverInterface. However, the router.argument_value_resolvers service in Drupal 10 expects a different type of object.
Solution:
To resolve the type error, you need to modify your compiler pass to register the MyUserIdResolver as a "resolver" service, instead of directly adding it to the router.argument_value_resolvers service.
<?php
namespace Drupal\my_module\Compiler;
use Drupal\Core\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;
class MyUserIdResolverCompilerPass implements CompilerPassInterface {
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container) {
$definition = new Definition('Drupal\my_module\MyUserIdResolver');
$definition->addTag('argument_value_resolver');
$container->setDefinition('my_module.my_user_id_resolver', $definition);
}
}
This code creates a new service definition for my_module.my_user_id_resolver and tags it with "argument_value_resolver". This allows Drupal's dependency injection system to automatically register the resolver and handle the correct type of object.
Additional Value:
- This solution is applicable to all argument value resolvers implemented through compiler passes in Drupal 10.
- Ensure your
MyUserIdResolverclass implements\Drupal\Core\Routing\ArgumentValueResolverInterfaceto be correctly recognized by the routing system. - Remember to clear your Drupal cache after applying this change.
Resources:
This solution should address the type error you're facing and allow your custom argument value resolver to work as intended. Remember to understand the core concepts of compiler passes and argument value resolvers in Drupal for efficient development.
