tap/app/models/order_item.rb
2015-02-09 17:06:24 +01:00

37 lines
835 B
Ruby

# == Schema Information
#
# Table name: order_items
#
# id :integer not null, primary key
# order_id :integer not null
# 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, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
after_create :remove_from_stock
before_destroy :put_back_in_stock
accepts_nested_attributes_for :product
def product_attributes=(attributes)
self.product = Product.find(attributes[:id])
super
end
private
def remove_from_stock
product.increment!(:stock, - self.count)
end
def put_back_in_stock
product.increment!(:stock, self.count)
end
end