rails g migration AddCustomerAppointmentToReport

gistfile1.rb

rails g migration AddCustomerAppointmentToReport customer_appointment:date

## migration file

class AddCustomerAppointmentToReport < ActiveRecord::Migration
  def self.up
    add_column :reports, :customer_appointment, :date
  end

  def self.down
    remove_column :reports, :customer_appointment
  end
end