38 lines
835 B
Ruby
38 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
|