data-migration-1.rb

class DropSubscriptionRewards < ActiveRecord::Migration[5.2]
  def up
    subscription_rewards = SubscriptionReward.all 
    subscription_rewards.each do |subscription_reward|
      MissionReward.create!(
        subscription_mission_id: subscription_reward.subscription_mission_id,
        reward_id: subscription_reward.reward_id,
        starts_at: subscription_reward.created_at,
        ends_at: subscription_reward.expires_at,
        redeemed_at: subscription_reward.redeemed_at
      )
    end

    drop_table :subscription_rewards
  end

  def down
    raise ActiveRecord::IrreversibleMigration
  end
end