批量删除统计表

lib/tasks/version_v1.rb

+namespace :data_migrations do
+  namespace :version do
+  
+    desc "batch delete notification_statistics data"
+    task :v1_batch_delete_notification_statistics_data => :environment do
+      first_id = NotificationStatistic.first.id
+      last_id = NotificationStatistic.where("notification_statistics.created_at < ?", '2020-04-30 16:00:00').last.id
+      
+      
+      first_id.step(last_id, 10000) do |i|
+        NotificationStatistic.where(id: [i...i+10000]).delete_all
+      end
+    end
+  end
+end
\ No newline at end of file