DCI in real code

gistfile1.rb

class ReceivablesManagementContext
  def initialize(params)
    @params = params
  end

  def save_receivable
    sanitize_controller_params
    @receivable = AccountReceivable.new(@params[:account_receivable])
    @receivable.customer_id = @params[:customer_id]
    @receivable.save
  end

  private

  def sanitize_controller_params
    sanitize_date "due_to"
    sanitize_currency "value"
  end

  def sanitize_date(key)
    @params[:account_receivable][key].extend DateSanitizer
    @params[:account_receivable][key].parse_date_for_active_record!
  end

  def sanitize_currency(key)
    @params[:account_receivable][key].extend CurrencyParser
    @params[:account_receivable][key].to_float!
  end
end