migration.rb

class DowncaseEmailAddresses < ActiveRecord::Migration
  def up
    # Downcase all User emails
    User.update_all('email = LOWER(email)')

    # Downcase all ContactRequest emails
    ContactRequest.update_all('email_address = LOWER(email_address)')

    # Downcase all Reservation emails
    Reservation.update_all('renter_email = LOWER(renter_email)')
  end

  def down
    raise ActiveRecord::IrreversibleMigration
  end
end