FIX revert system_notification_histories[bug]

app/models/system_notification.rb

@@ -17,4 +17,8 @@ class SystemNotification < ApplicationRecord
 
   scope :is_top, lambda { where(is_top: true) }
 
+  def read_member?(user_id)
+    self.system_notification_histories.where(user_id: user_id).present? ? true : false
+  end
+
 end

app/views/settings/show.json.jbuilder

@@ -60,6 +60,7 @@ json.setting do
   if @top_system_notification.present?
     json.system_notification do 
       json.(@top_system_notification, :id, :subject, :sub_subject, :content)
+      json.is_read @top_system_notification.read_member?(current_user&.id)
     end
   else
     json.system_notification nil