tap/app/models/order_item.rb
2015-10-28 22:07:48 +01:00

32 lines
859 B
Ruby

# == Schema Information
#
# Table name: order_items
#
# id :integer not null, primary key
# order_id :integer
# product_id :integer not null
# count :integer default("0")
#
class OrderItem < ActiveRecord::Base
belongs_to :order
belongs_to :product
validates :product, presence: true
validates :count, presence: true, numericality: { only_integer: true,
less_than_or_equal_to: ->(oi) { oi.product.try(:stock) || 100 },
greater_than_or_equal_to: 0 }
before_destroy :put_back_in_stock!
after_create :remove_from_stock!
private
def remove_from_stock!
product.decrement!(:stock, count)
end
def put_back_in_stock!
product.increment!(:stock, self.count)
end
end