optimize edit json

app/controllers/templates_controller.rb

@@ -1,6 +1,10 @@
 # frozen_string_literal: true
 
 class TemplatesController < ApplicationController
+  TEMPLATE_FIELDS = %i[id author_id folder_id external_id name slug
+                       schema fields submitters variables_schema preferences
+                       shared_link source archived_at created_at updated_at].freeze
+
   load_and_authorize_resource :template
 
   def show
@@ -33,10 +37,11 @@ class TemplatesController < ApplicationController
     ).call
 
     @template_data =
-      @template.as_json.merge(
+      @template.as_json(only: TEMPLATE_FIELDS).merge(
         documents: @template.schema_documents.as_json(
+          only: %i[id uuid],
           methods: %i[metadata signed_key],
-          include: { preview_images: { methods: %i[url metadata filename] } }
+          include: { preview_images: { only: %i[id], methods: %i[url metadata filename] } }
         )
       ).to_json