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rails--rails/activerecord/test/models/invoice.rb
2017-07-19 22:27:07 +03:00

6 lines
189 B
Ruby

# frozen_string_literal: true
class Invoice < ActiveRecord::Base
has_many :line_items, autosave: true
before_save { |record| record.balance = record.line_items.map(&:amount).sum }
end