Decorate a Serializer when JSON data is provided

Author: alexislefebvre

core/serialization.md

@@ -703,6 +703,15 @@ services:
         arguments: [ '@App\Serializer\ApiNormalizer.inner' ]
 ```
 
+Note: this normalizer will work only for JSON-LD format, if you want to process JSON data too, you have to decorate another service:
+
+```yaml
+    app.serializer.app_normalizer.json:
+        class: App\Serializer\ApiNormalizer
+        decorates: 'api_platform.serializer.normalizer.item'
+        arguments: [ '@app.serializer.app_normalizer.json.inner' ]
+```
+
 ```php
 <?php
 // api/src/Serializer/ApiNormalizer