class ModifyPraisesCountForDiscuess < ActiveRecord::Migration[5.2]
  def change
    discusses =  Discuss.includes(:praise_treads).unscoped
    discusses.find_each do |d|
      praises_count = d.praise_treads.liker.count
      d.update_column(:praises_count, praises_count)
    end
  end
end