Improve docs (#124)

Author: HypeMC

docs/README.md

@@ -362,7 +362,7 @@ class Post
 
 ### Adding Conditional Logic with Expression Language
 
-[Symfony's Expression Language component](https://symfony.com/doc/current/components/expression_language.html) can be
+[Symfony's ExpressionLanguage component](https://symfony.com/doc/current/components/expression_language.html) can be
 used to add conditions that must be met for the purge to occur. In these expressions, the entity is available as the
 `obj` variable:
 

docs/complex-route-params.md

@@ -7,7 +7,7 @@ values to create flexible and powerful purge rules.
 ## Using Nested Properties
 
 You can access nested properties of an entity to define route parameters by
-using [Symfony's Property Access](https://symfony.com/doc/current/components/property_access.html) syntax:
+using [Symfony's PropertyAccess](https://symfony.com/doc/current/components/property_access.html) syntax:
 
 ```php
 #[Route('/author/{id<\d+>}', name: 'author_details', methods: 'GET')]
@@ -134,7 +134,25 @@ public function listAction(string $lang)
 }
 ```
 
-To make this work, ensure your service is tagged correctly in the service configuration:
+By default, the entire entity being purged is passed to the route parameter service.
+If your service only needs a specific part of the entity, you can limit what is passed by providing a second argument to
+`DynamicValues`.
+
+This argument is a **Symfony PropertyAccess property path** and will be resolved against the entity before being passed
+to the service:
+
+```php
+use Sofascore\PurgatoryBundle\Attribute\RouteParamValue\DynamicValues;
+
+#[Route('/posts/{type}', name: 'posts_list', methods: 'GET')]
+#[PurgeOn(Post::class, routeParams: ['type' => new DynamicValues('my_service', 'property')])]
+public function listAction(string $lang)
+{
+}
+```
+
+To make the service available for resolving route parameter values, ensure it is tagged correctly in the service
+configuration:
 
 ```yaml
 # services.yaml

docs/purge-subscriptions-using-yaml.md

@@ -63,4 +63,10 @@ posts_list:
     class: App\Entity\Post
     route_params:
         type: !dynamic my_service
+
+# Limiting the value passed to the service using a property path
+posts_list:
+    class: App\Entity\Post
+    route_params:
+        type: !dynamic [ my_service, prop ]
 ```

tests/Functional/TestApplication/Controller/VehicleController.php

@@ -18,7 +18,7 @@ class VehicleController
     #[Route('/{id}/number-of-engines', 'number_of_engines')]
     #[AnnotationRoute('/{id}/number-of-engines', name: 'number_of_engines')]
     #[PurgeOn(Vehicle::class, target: 'numberOfEngines')]
-    public function numberOfEnginesAction(Vehicle $animal)
+    public function numberOfEnginesAction(Vehicle $vehicle)
     {
     }
 }