class CreateMksRateChargeableServiceDiscounts < ActiveRecord::Migration[5.1]
  def change
    create_table :mks_rate_chargeable_service_discounts do |t|
      t.string :unit_variable, null: false
      t.float :from, null: false
      t.float :to, null: false
      t.float :value, null: false
      t.integer :chargeable_service_id

      t.timestamps
    end

    add_foreign_key :mks_rate_chargeable_service_discounts,
                    :mks_rate_chargeable_services, column: :chargeable_service_id
  end
end