show files attachments instead of file infos in API for acq.media release

app/controllers/api/releases_controller.rb

@@ -45,13 +45,13 @@ class Api::ReleasesController < Api::ApiController
     if model_name == "acquired_media_release"
       mapping = {
         "#{model_name.camelize}": SerializableAcquiredMediaRelease,
-        FileInfo: SerializableFileInfo
+        "ActiveStorage::Attachment".to_sym => ActiveStorage::SerializableAttachment,
       }
 
       render jsonapi: release,
            status: status,
            class: mapping,
-           include: [:file_infos]
+           include: [:files]
     else
       mapping = {
         "#{model_name.camelize}": show_serializable,

app/serializers/serializable_acquired_media_release.rb

@@ -8,13 +8,13 @@ class SerializableAcquiredMediaRelease < JSONAPI::Serializable::Resource
               :applicable_medium_id, :applicable_medium_text, :territory_id, :territory_text, :term_id, :term_text,
               :restriction_id, :restriction_text, :categories, :description, :tag_list
   
-  has_many :file_infos do
+  has_many :files do
     data do
-      @object.file_infos
+      @object.files
     end
 
     meta do
-      { count: @object.file_infos.size }
+      { count: @object.files.size }
     end
   end
 end