rake task delete history if size > limit

lib/tasks/delete_record.rake

 namespace :delete_record do
   desc 'Delete history when total greater than default limit'
-  task history: :environment do
-    users = User.includes(:histories).all
+  task histories: :environment do
+    users = User.joins(:histories)
+                .group(:user_id)
+                .select('users.id')
+                .having("count(histories.id) > #{History::NUMBER_STORED_HISTORIES}")
     users.each do |user|
       break if user.histories.size <= History::NUMBER_STORED_HISTORIES
-      lasted = user.histories.last(History::NUMBER_STORED_HISTORIES).pluck(:id)
-      user.histories.where.not(id: lasted).delete_all
+      lastest = user.histories.order(updated_at: :desc).take(History::NUMBER_STORED_HISTORIES).pluck(:id)
+      user.histories.where.not(id: lastest).delete_all
     end
   end
 end