feat: add active scope

app/models/notification.rb

@@ -1,3 +1,5 @@
 class Notification < ApplicationRecord
   acts_as_readable
+
+  scope :active, -> { where("start_date <= ?", Time.zone.now).where("end_date >= ?", Time.zone.now) }
 end

app/models/user.rb

@@ -230,7 +230,7 @@ class User < ApplicationRecord
   end
 
   def active_unread_notifications
-    Notification.unread_by(self)
+    Notification.active.unread_by(self)
   end
 
   def oldest_active_unread_notification