1class RecreateAllActivities < ActiveRecord::Migration
 2  def change
 3    ActiveRecord::Base.transaction do
 4      Activity.destroy_all
 5      Favorite.find_each do |favorite|
 6        Activity.create(user: favorite.creation.author, subject: favorite, created_at: favorite.created_at, updated_at: favorite.updated_at)
 7      end
 8      Comment.find_each do |comment|
 9        Activity.create(user: comment.creation.author, subject: comment, created_at: comment.created_at, updated_at: comment.updated_at)
10      end
11    end
12  end
13end