class AddReplyQuotedToPosts < ActiveRecord::Migration[4.2] def up add_column :posts, :reply_quoted, :boolean, null: false, default: false execute "UPDATE posts p SET reply_quoted = true WHERE EXISTS( SELECT 1 FROM quoted_posts q JOIN posts p1 ON p1.post_number = p.reply_to_post_number AND p1.topic_id = p.topic_id WHERE q.post_id = p.id AND q.quoted_post_id = p1.id ) AND p.reply_to_post_number IS NOT NULL" end def down remove_column :posts, :reply_quoted end end