class RemoveDataToHomeworkAttach < ActiveRecord::Migration
  def up
    bidding_projects = BidingProject.joins(:bid).where("bids.reward_type = 3")
    bidding_projects.each do |biding|
      homework = HomeworkAttach.new
      homework.project_id = biding.project_id
      homework.bid_id = biding.bid_id
      homework.created_at = biding.created_at
      homework.updated_at = biding.updated_at
      homework.reward = biding.reward
      homework.description = biding.description
      homework.user_id = biding.user_id
      homework.state = 0
      homework.save
    end
  end

  def down
    bidding_projects = BidingProject.joins(:bid).where("bids.reward_type = 3")
    bidding_projects.each do |biding|
      homework = HomeworkAttach.where("bid_id = #{biding.bid_id} and user_id = #{biding.user_id}")
      homework.first.destroy
    end
  end
end